<s>
Evi	B-Application
(	O
formerly	O
True	B-Application
Knowledge	I-Application
)	O
is	O
a	O
technology	O
company	O
in	O
Cambridge	O
,	O
England	O
,	O
founded	O
by	O
William	O
Tunstall-Pedoe	O
,	O
which	O
specialises	O
in	O
knowledge	O
base	O
and	O
semantic	O
search	O
engine	O
software	O
.	O
</s>
<s>
Its	O
first	O
product	O
was	O
an	O
answer	B-Algorithm
engine	I-Algorithm
that	O
aimed	O
to	O
directly	O
answer	O
questions	O
on	O
any	O
subject	O
posed	O
in	O
plain	O
English	O
text	O
,	O
which	O
is	O
accomplished	O
using	O
a	O
database	O
of	O
discrete	O
facts	O
.	O
</s>
<s>
The	O
True	B-Application
Knowledge	I-Application
Answer	B-Algorithm
engine	I-Algorithm
was	O
launched	O
for	O
private	O
beta	O
testing	O
and	O
development	O
on	O
7	O
November	O
2007	O
.	O
</s>
<s>
In	O
January	O
2012	O
True	B-Application
Knowledge	I-Application
launched	O
a	O
major	O
new	O
product	O
Evi	B-Application
(	O
pronounced	O
ee-vee	O
)	O
,	O
an	O
artificial	B-Application
intelligence	I-Application
program	I-Application
which	O
can	O
be	O
communicated	O
with	O
using	O
natural	O
language	O
via	O
an	O
app	B-Application
on	O
iPhone	B-Device
and	O
Android	B-Application
.	O
</s>
<s>
The	O
company	O
changed	O
its	O
name	O
from	O
True	B-Application
Knowledge	I-Application
to	O
Evi	B-Application
in	O
June	O
2012	O
.	O
</s>
<s>
In	O
October	O
2012	O
,	O
Evi	B-Application
was	O
acquired	O
by	O
Amazon	B-Application
and	O
is	O
now	O
part	O
of	O
the	O
Amazon	B-Application
group	O
of	O
companies	O
.	O
</s>
<s>
The	O
technology	O
and	O
team	O
became	O
a	O
key	O
part	O
of	O
Amazon	B-Application
Alexa	I-Application
assistant	O
(	O
debuting	O
with	O
the	O
Amazon	B-Device
Echo	I-Device
)	O
.	O
</s>
<s>
The	O
True	B-Application
Knowledge	I-Application
Answer	B-Algorithm
Engine	I-Algorithm
attempts	O
to	O
comprehend	B-General_Concept
posed	O
questions	O
by	O
disambiguating	B-General_Concept
from	O
all	O
possible	O
meanings	O
of	O
the	O
words	O
in	O
the	O
question	O
to	O
find	O
the	O
most	O
likely	O
meaning	O
of	O
the	O
question	O
being	O
asked	O
.	O
</s>
<s>
As	O
these	O
facts	O
are	O
stored	O
in	O
a	O
form	O
that	O
the	O
computer	O
can	O
understand	O
,	O
the	O
answer	B-Algorithm
engine	I-Algorithm
attempts	O
to	O
produce	O
an	O
answer	O
to	O
what	O
it	O
comprehends	O
to	O
be	O
the	O
question	O
by	O
logically	O
deducing	O
from	O
them	O
.	O
</s>
<s>
"	O
,	O
True	B-Application
Knowledge	I-Application
would	O
reason	O
from	O
the	O
facts	O
"	O
George	O
W	O
.	O
Bush	O
is	O
a	O
president	O
"	O
,	O
"	O
George	O
W	O
.	O
Bush	O
is	O
a	O
human	O
being	O
"	O
,	O
"	O
A	O
president	O
is	O
a	O
subclass	O
of	O
human	O
being	O
"	O
,	O
"	O
Date	O
of	O
creation	O
is	O
a	O
more	O
general	O
form	O
for	O
birth	O
date	O
"	O
,	O
and	O
"	O
the	O
6th	O
of	O
July	O
is	O
the	O
date	O
of	O
creation	O
for	O
George	O
W	O
.	O
Bush	O
"	O
,	O
to	O
produce	O
the	O
simple	O
answer	O
,	O
"	O
the	O
6th	O
of	O
July	O
"	O
.	O
</s>
<s>
True	B-Application
Knowledge	I-Application
differs	O
from	O
competitors	O
like	O
Freebase	O
and	O
DBpedia	B-Application
in	O
that	O
they	O
offer	O
natural	O
language	O
access	O
.	O
</s>
<s>
Unlike	O
the	O
others	O
however	O
,	O
users	O
who	O
post	O
information	O
to	O
True	B-Application
Knowledge	I-Application
granted	O
the	O
company	O
a	O
"	O
non-exclusive	O
,	O
irrevocable	O
,	O
perpetual	O
licence	O
to	O
use	O
such	O
information	O
to	O
operate	O
this	O
website	O
and	O
for	O
any	O
other	O
purposes	O
"	O
.	O
</s>
<s>
Evi	B-Application
gathers	O
information	O
for	O
its	O
database	O
in	O
two	O
ways	O
:	O
importing	O
it	O
from	O
"	O
credible	O
"	O
external	O
databases	O
(	O
which	O
for	O
them	O
includes	O
Wikipedia	O
)	O
and	O
from	O
user	O
submission	O
following	O
a	O
consistent	O
format	O
and	O
detailed	O
process	O
for	O
input	O
.	O
</s>
<s>
True	B-Application
Knowledge	I-Application
strives	O
to	O
monitor	O
this	O
user	O
submitted	O
knowledge	O
in	O
multiple	O
ways	O
.	O
</s>
<s>
One	O
method	O
involves	O
a	O
system	O
of	O
checks	O
and	O
balances	O
in	O
some	O
ways	O
similar	O
to	O
Wikipedia	O
's	O
,	O
allowing	O
users	O
to	O
modify	O
or	O
"	O
agree	O
"	O
/	O
"	O
disagree	O
"	O
with	O
information	O
presented	O
by	O
True	B-Application
Knowledge	I-Application
.	O
</s>
<s>
On	O
21	O
November	O
2008	O
,	O
True	B-Application
Knowledge	I-Application
announced	O
on	O
its	O
official	O
blog	O
that	O
over	O
100,000	O
facts	O
had	O
been	O
added	O
by	O
beta	O
users	O
and	O
as	O
of	O
August	O
2010	O
,	O
the	O
True	B-Application
Knowledge	I-Application
database	O
overall	O
contained	O
283,511,156	O
facts	O
about	O
9,237,091	O
things	O
.	O
</s>
<s>
In	O
November	O
2010	O
,	O
True	B-Application
Knowledge	I-Application
used	O
some	O
300	O
million	O
facts	O
to	O
calculate	O
that	O
Sunday	O
,	O
11	O
April	O
1954	O
,	O
was	O
the	O
most	O
boring	O
day	O
since	O
1900	O
.	O
</s>
<s>
On	O
7	O
May	O
2007	O
,	O
True	B-Application
Knowledge	I-Application
Ltd	O
.	O
announced	O
it	O
would	O
be	O
"	O
actively	O
seeking	O
investments	O
following	O
several	O
years	O
of	O
internally-funded	O
development	O
"	O
.	O
</s>
<s>
Then	O
,	O
on	O
17	O
September	O
2007	O
,	O
Octopus	O
Ventures	O
,	O
a	O
British	O
venture	O
capitalist	O
firm	O
,	O
announced	O
its	O
investment	O
of	O
more	O
than	O
$1.2	O
million	O
into	O
True	B-Application
Knowledge	I-Application
,	O
the	O
first	O
significant	O
investment	O
into	O
the	O
company	O
,	O
allowing	O
it	O
to	O
further	O
develop	O
its	O
website	O
and	O
achieve	O
critical	O
milestones	O
towards	O
bringing	O
the	O
True	B-Application
Knowledge	I-Application
Answer	B-Algorithm
Engine	I-Algorithm
to	O
market	O
.	O
</s>
<s>
On	O
30	O
July	O
2008	O
,	O
True	B-Application
Knowledge	I-Application
announced	O
it	O
had	O
raised	O
another	O
$4million	O
in	O
a	O
second	O
round	O
of	O
funding	O
from	O
Octopus	O
Ventures	O
and	O
other	O
investors	O
that	O
would	O
be	O
used	O
towards	O
expanding	O
its	O
staff	O
,	O
developing	O
new	O
products	O
,	O
and	O
moving	O
towards	O
a	O
rollout	O
within	O
12	O
months	O
.	O
</s>
<s>
Evi	B-Application
was	O
launched	O
to	O
the	O
public	O
in	O
January	O
2012	O
through	O
the	O
iTunes	O
App	B-Application
Store	O
and	O
Android	B-Application
Marketplace	I-Application
(	O
Now	O
rebranded	O
as	O
Google	B-Application
Play	I-Application
)	O
.	O
</s>
<s>
Evi	B-Application
is	O
a	O
cloud-based	B-Architecture
Artificial	B-Application
Intelligence	I-Application
(	O
AI	B-Application
)	O
which	O
builds	O
upon	O
the	O
core	O
semantic	O
search	O
technology	O
developed	O
by	O
the	O
company	O
and	O
adds	O
conversation	O
,	O
external	O
APIs	B-Application
,	O
location	O
sensitivity	O
and	O
other	O
features	O
.	O
</s>
<s>
Users	O
can	O
talk	O
to	O
Evi	B-Application
via	O
an	O
iPhone	B-Device
and	O
Android	B-Application
app	B-Application
.	O
</s>
<s>
In	O
May	O
an	O
update	O
was	O
released	O
on	O
both	O
Android	B-Application
and	O
iOS	O
that	O
introduced	O
voice	B-Application
controls	I-Application
for	O
phone	O
,	O
SMS	B-Device
,	O
and	O
Email	O
.	O
</s>
