<s>
Alert	B-General_Concept
correlation	I-General_Concept
is	O
a	O
type	O
of	O
log	B-Application
analysis	I-Application
.	O
</s>
<s>
Example	O
of	O
simple	O
alert	B-General_Concept
correlation	I-General_Concept
is	O
grouping	O
invalid	O
login	O
attempts	O
to	O
report	O
single	O
incident	O
like	O
"	O
10000	O
invalid	O
login	O
attempts	O
on	O
host	O
X	O
"	O
.	O
</s>
