<s>
Content	B-General_Concept
determination	I-General_Concept
is	O
the	O
subtask	O
of	O
natural	B-General_Concept
language	I-General_Concept
generation	I-General_Concept
(	O
NLG	O
)	O
that	O
involves	O
deciding	O
on	O
the	O
information	O
to	O
be	O
communicated	O
in	O
a	O
generated	O
text	O
.	O
</s>
<s>
It	O
is	O
closely	O
related	O
to	O
the	O
task	O
of	O
document	B-General_Concept
structuring	I-General_Concept
.	O
</s>
<s>
There	O
are	O
three	O
general	O
issues	O
which	O
almost	O
always	O
impact	O
the	O
content	B-General_Concept
determination	I-General_Concept
task	O
,	O
and	O
can	O
be	O
illustrated	O
with	O
the	O
above	O
example	O
.	O
</s>
<s>
Regardless	O
,	O
content	B-General_Concept
determination	I-General_Concept
is	O
very	O
important	O
to	O
users	O
,	O
indeed	O
in	O
many	O
cases	O
the	O
quality	O
of	O
content	B-General_Concept
determination	I-General_Concept
is	O
the	O
most	O
important	O
factor	O
(	O
from	O
the	O
user	O
's	O
perspective	O
)	O
in	O
determining	O
the	O
overall	O
quality	O
of	O
the	O
generated	O
text	O
.	O
</s>
<s>
There	O
are	O
three	O
basic	O
approaches	O
to	O
document	B-General_Concept
structuring	I-General_Concept
:	O
schemas	O
(	O
content	O
templates	O
)	O
,	O
statistical	O
approaches	O
,	O
and	O
explicit	O
reasoning	O
.	O
</s>
<s>
Schemas	O
are	O
templates	O
which	O
explicitly	O
specify	O
the	O
content	O
of	O
a	O
generated	O
text	O
(	O
as	O
well	O
as	O
document	B-General_Concept
structuring	I-General_Concept
information	O
)	O
.	O
</s>
