<s>
Mystery	B-Application
Seeker	I-Application
was	O
a	O
website	O
based	O
on	O
the	B-Application
Google	I-Application
search	O
engine	O
.	O
</s>
<s>
that	O
until	O
November	O
30	O
,	O
2009	O
had	O
been	O
known	O
as	O
Mystery	B-Application
Google	I-Application
.	O
</s>
<s>
The	O
WHOIS	B-Protocol
domain	O
name	O
record	O
for	O
mysterygoogle.com	O
was	O
created	O
on	O
10	O
February	O
2009	O
with	O
registrant	O
Google	B-Application
Inc	I-Application
,	O
but	O
since	O
February	O
26	O
,	O
2017	O
it	O
has	O
had	O
no	O
website	O
.	O
</s>
<s>
Upon	O
a	O
search	O
query	O
,	O
Mystery	B-Application
Seeker	I-Application
returns	O
the	O
results	O
from	O
the	O
previous	O
search	O
,	O
so	O
"	O
you	O
get	O
what	O
the	O
person	O
before	O
you	O
searched	O
for.	O
"	O
</s>
<s>
There	O
is	O
a	O
trend	O
among	O
the	O
people	O
on	O
Mystery	B-Application
Seeker	I-Application
to	O
add	O
so-called	O
"	O
missions	O
"	O
,	O
where	O
the	O
next	O
user	O
is	O
asked	O
to	O
do	O
something	O
.	O
</s>
<s>
Due	O
to	O
the	O
high	O
number	O
of	O
posted	O
missions	O
involving	O
phone	O
numbers	O
,	O
Mystery	B-Application
Seeker	I-Application
received	O
enough	O
complaints	O
to	O
remove	O
phone	O
numbers	O
from	O
the	O
site	O
.	O
</s>
<s>
In	O
November	O
2009	O
Mystery	B-Application
Seeker	I-Application
had	O
440,000	O
unique	O
visitors	O
,	O
making	O
it	O
one	O
of	O
the	O
most	O
highly	O
trafficked	O
social	O
entertainment	O
sites	O
online	O
.	O
</s>
