<s>
Fighter	B-Protocol
Ace	I-Protocol
was	O
a	O
massively	B-Application
multiplayer	I-Application
online	I-Application
combat	O
flight	O
simulation	O
game	O
series	O
in	O
which	O
one	O
flies	O
World	O
War	O
II	O
fighter	O
planes	O
in	O
combat	O
against	O
other	O
players	O
and	O
virtual	O
pilots	O
.	O
</s>
