<s>
Unique	B-General_Concept
negative	I-General_Concept
dimension	I-General_Concept
(	O
UND	O
)	O
is	O
a	O
complexity	O
measure	O
for	O
the	O
model	O
of	O
learning	O
from	O
positive	O
examples	O
.	O
</s>
<s>
The	O
unique	B-General_Concept
negative	I-General_Concept
dimension	I-General_Concept
of	O
a	O
class	O
of	O
concepts	O
is	O
the	O
size	O
of	O
the	O
maximum	O
subclass	O
such	O
that	O
for	O
every	O
concept	O
,	O
we	O
have	O
is	O
nonempty	O
.	O
</s>
