<s>
In	O
natural	O
language	O
processing	O
,	O
open	B-General_Concept
information	I-General_Concept
extraction	I-General_Concept
(	O
OIE	O
)	O
is	O
the	O
task	O
of	O
generating	O
a	O
structured	O
,	O
machine-readable	O
representation	O
of	O
the	O
information	O
in	O
text	O
,	O
usually	O
in	O
the	O
form	O
of	O
triples	O
or	O
n-ary	O
propositions	O
.	O
</s>
<s>
In	O
computer	O
science	O
transforming	O
OIE	O
extractions	O
into	O
ontological	O
facts	O
is	O
known	O
as	O
relation	B-General_Concept
extraction	I-General_Concept
.	O
</s>
<s>
In	O
fact	O
,	O
OIE	O
can	O
be	O
seen	O
as	O
the	O
first	O
step	O
to	O
a	O
wide	O
range	O
of	O
deeper	O
text	O
understanding	O
tasks	O
such	O
as	O
relation	B-General_Concept
extraction	I-General_Concept
,	O
knowledge-base	O
construction	O
,	O
question	B-Algorithm
answering	I-Algorithm
,	O
semantic	O
role	O
labeling	O
.	O
</s>
