With no explanation, label each line with "O", "person-athlete", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Eli
Tomac
dominated
the
450cc
Main
Event
for
his
third
win
of
the
year
,
while
Austin
Forkner
returned
to
his
winning
ways
in
the
250cc
Eastern
Regional
Main
Event
.
Eli:O
Tomac:O
dominated:O
the:O
450cc:event-other
Main:event-other
Event:event-other
for:O
his:O
third:O
win:O
of:O
the:O
year:O
,:O
while:O
Austin:person-athlete
Forkner:person-athlete
returned:O
to:O
his:O
winning:O
ways:O
in:O
the:O
250cc:event-other
Eastern:event-other
Regional:event-other
Main:event-other
Event:event-other
.:O