<s>
Controlled	B-General_Concept
natural	I-General_Concept
languages	I-General_Concept
(	O
CNLs	O
)	O
are	O
subsets	O
of	O
natural	O
languages	O
that	O
are	O
obtained	O
by	O
restricting	O
the	O
grammar	O
and	O
vocabulary	O
in	O
order	O
to	O
reduce	O
or	O
eliminate	O
ambiguity	O
and	O
complexity	O
.	O
</s>
<s>
Traditionally	O
,	O
controlled	B-General_Concept
languages	I-General_Concept
fall	O
into	O
two	O
major	O
types	O
:	O
those	O
that	O
improve	O
readability	O
for	O
human	O
readers	O
(	O
e.g.	O
</s>
<s>
The	O
first	O
type	O
of	O
languages	O
(	O
often	O
called	O
"	O
simplified	O
"	O
or	O
"	O
technical	O
"	O
languages	O
)	O
,	O
for	O
example	O
ASD	O
Simplified	O
Technical	O
English	O
,	O
Caterpillar	O
Technical	O
English	O
,	O
IBM	O
's	O
Easy	O
English	O
,	O
are	O
used	O
in	O
the	O
industry	O
to	O
increase	O
the	O
quality	O
of	O
technical	O
documentation	O
,	O
and	O
possibly	O
simplify	O
the	O
semi-automatic	B-Application
translation	I-Application
of	O
the	O
documentation	O
.	O
</s>
<s>
Thus	O
,	O
those	O
languages	O
can	O
be	O
used	O
as	O
knowledge	O
representation	O
languages	O
,	O
and	O
writing	O
of	O
those	O
languages	O
is	O
supported	O
by	O
fully	O
automatic	O
consistency	B-General_Concept
and	O
redundancy	O
checks	O
,	O
query	B-Algorithm
answering	I-Algorithm
,	O
etc	O
.	O
</s>
<s>
Existing	O
controlled	B-General_Concept
natural	I-General_Concept
languages	I-General_Concept
include	O
:	O
</s>
