With no explanation, label each line with "O", "person-athlete", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Quarterback
Steve
Panella
was
injured
early
in
the
season
,
forcing
numerous
backups
to
take
the
job
.
Quarterback:O
Steve:person-athlete
Panella:person-athlete
was:O
injured:O
early:O
in:O
the:O
season:O
,:O
forcing:O
numerous:O
backups:O
to:O
take:O
the:O
job:O
.:O