<s>
Universal	B-General_Concept
Networking	I-General_Concept
Language	I-General_Concept
(	O
UNL	O
)	O
is	O
a	O
declarative	O
formal	O
language	O
specifically	O
designed	O
to	O
represent	O
semantic	O
data	O
extracted	O
from	O
natural	O
language	O
texts	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
as	O
a	O
pivot	O
language	O
in	O
interlingual	B-General_Concept
machine	I-General_Concept
translation	I-General_Concept
systems	O
or	O
as	O
a	O
knowledge	O
representation	O
language	O
in	O
information	B-Library
retrieval	I-Library
applications	O
.	O
</s>
