<s>
SPL	O
(	O
Sentence	B-General_Concept
Plan	I-General_Concept
Language	I-General_Concept
)	O
is	O
an	O
abstract	O
notation	O
representing	O
the	O
semantics	O
of	O
a	O
sentence	O
in	O
natural	O
language	O
.	O
</s>
<s>
In	O
a	O
classical	O
Natural	B-General_Concept
Language	I-General_Concept
Generation	I-General_Concept
(	O
NLG	O
)	O
workflow	O
,	O
an	O
initial	O
text	O
plan	O
(	O
hierarchically	O
or	O
sequentially	O
organized	O
factoids	O
,	O
often	O
modelled	O
in	O
accordance	O
with	O
Rhetorical	O
Structure	O
Theory	O
)	O
is	O
transformed	O
by	O
a	O
sentence	O
planner	O
(	O
generator	O
)	O
component	O
to	O
a	O
sequence	O
of	O
sentence	O
plans	O
modelled	O
in	O
a	O
Sentence	B-General_Concept
Plan	I-General_Concept
Language	I-General_Concept
.	O
</s>
<s>
A	O
surface	O
generator	O
can	O
be	O
used	O
to	O
transform	O
the	O
SPL	B-General_Concept
notation	I-General_Concept
into	O
natural	O
language	O
sentences	O
.	O
</s>
