With no explanation, label each line with "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
This
was
just
the
second
nine-inning
perfect
complete
game
in
the
100-year
history
of
the
Pacific
Coast
League
.
This:O
was:O
just:O
the:O
second:O
nine-inning:O
perfect:O
complete:O
game:O
in:O
the:O
100-year:O
history:O
of:O
the:O
Pacific:event-sportsevent
Coast:event-sportsevent
League:event-sportsevent
.:O