<s>
MatrixNet	B-Application
is	O
a	O
proprietary	O
machine	O
learning	O
algorithm	O
developed	O
by	O
Yandex	O
and	O
used	O
widely	O
throughout	O
the	O
company	O
products	O
.	O
</s>
<s>
The	O
algorithm	O
is	O
based	O
on	O
gradient	B-Algorithm
boosting	I-Algorithm
and	O
was	O
introduced	O
since	O
2009	O
.	O
</s>
