With no explanation, label each line with "person-athlete", "organization-sportsteam", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Calvin
became
the
starting
kickoff
returner
for
the
Eagles
after
Ellis
Hobbs
suffered
an
injury
early
in
the
season
.
Calvin:person-athlete
became:O
the:O
starting:O
kickoff:O
returner:O
for:O
the:O
Eagles:organization-sportsteam
after:O
Ellis:person-athlete
Hobbs:person-athlete
suffered:O
an:O
injury:O
early:O
in:O
the:O
season:O
.:O