<s>
Prototype	B-Algorithm
methods	I-Algorithm
are	O
machine	O
learning	O
methods	O
that	O
use	O
data	O
prototypes	B-Application
.	O
</s>
<s>
A	O
data	O
prototype	B-Application
is	O
a	O
data	O
value	O
that	O
reflects	O
other	O
values	O
in	O
its	O
class	O
,	O
e.g.	O
,	O
the	O
centroid	O
in	O
a	O
K-means	B-Algorithm
clustering	I-Algorithm
problem	O
.	O
</s>
<s>
While	O
K-nearest	O
neighbor	O
's	O
does	O
not	O
use	O
prototypes	B-Application
,	O
it	O
is	O
similar	O
to	O
prototype	B-Algorithm
methods	I-Algorithm
like	O
K-means	B-Algorithm
clustering	I-Algorithm
.	O
</s>
