<s>
The	O
Message	B-General_Concept
Understanding	I-General_Concept
Conferences	I-General_Concept
(	O
MUC	O
)	O
for	O
computing	O
and	O
computer	B-General_Concept
science	I-General_Concept
,	O
were	O
initiated	O
and	O
financed	O
by	O
DARPA	O
(	O
Defense	O
Advanced	O
Research	O
Projects	O
Agency	O
)	O
to	O
encourage	O
the	O
development	O
of	O
new	O
and	O
better	O
methods	O
of	O
information	B-General_Concept
extraction	I-General_Concept
.	O
</s>
<s>
At	O
the	O
sixth	O
conference	O
(	O
MUC-6	O
)	O
the	O
task	O
of	O
recognition	O
of	O
named	B-General_Concept
entities	I-General_Concept
and	O
coreference	O
was	O
added	O
.	O
</s>
<s>
the	O
change	O
in	O
business	O
interest	O
in	O
information	B-General_Concept
extraction	I-General_Concept
taking	O
place	O
at	O
the	O
time	O
.	O
</s>
<s>
Ralph	O
Grishman	O
,	O
Beth	O
Sundheim	O
:	O
Message	B-General_Concept
Understanding	I-General_Concept
Conference	I-General_Concept
-	O
6	O
:	O
A	O
Brief	O
History	O
.	O
</s>
