<s>
A	O
statistically	B-General_Concept
improbable	I-General_Concept
phrase	I-General_Concept
(	O
SIP	O
)	O
is	O
a	O
phrase	O
or	O
set	O
of	O
words	O
that	O
occurs	O
more	O
frequently	O
in	O
a	O
document	O
(	O
or	O
collection	O
of	O
documents	O
)	O
than	O
in	O
some	O
larger	O
corpus	O
.	O
</s>
<s>
Amazon.com	B-Application
uses	O
this	O
concept	O
in	O
determining	O
keywords	O
for	O
a	O
given	O
book	O
or	O
chapter	O
,	O
since	O
keywords	O
of	O
a	O
book	O
or	O
chapter	O
are	O
likely	O
to	O
appear	O
disproportionately	O
within	O
that	O
section	O
.	O
</s>
<s>
Christian	O
Rudder	O
has	O
also	O
used	O
this	O
concept	O
with	O
data	O
from	O
online	O
dating	O
profiles	O
and	O
Twitter	B-Application
posts	O
to	O
determine	O
the	O
phrases	O
most	O
characteristic	O
of	O
a	O
given	O
race	O
or	O
gender	O
in	O
his	O
book	O
Dataclysm	O
.	O
</s>
<s>
"	O
Explicit	O
Boolean	O
algorithm	O
"	O
would	O
be	O
a	O
statistically	B-General_Concept
improbable	I-General_Concept
phrase	I-General_Concept
.	O
</s>
<s>
Statistically	B-General_Concept
improbable	I-General_Concept
phrases	I-General_Concept
of	O
Darwin	O
's	O
On	O
the	O
Origin	O
of	O
Species	O
could	O
be	O
:	O
temperate	O
productions	O
,	O
genera	O
descended	O
,	O
transitional	O
gradations	O
,	O
unknown	O
progenitor	O
,	O
fossiliferous	O
formations	O
,	O
our	O
domestic	O
breeds	O
,	O
modified	O
offspring	O
,	O
doubtful	O
forms	O
,	O
closely	O
allied	O
forms	O
,	O
profitable	O
variations	O
,	O
enormously	O
remote	O
,	O
transitional	O
grades	O
,	O
very	O
distinct	O
species	O
and	O
mongrel	O
offspring	O
.	O
</s>
