With no explanation, label each line with "person-athlete", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Evans
underwent
minor
shoulder
surgery
in
the
2008
offseason
.
Evans:person-athlete
underwent:O
minor:O
shoulder:O
surgery:O
in:O
the:O
2008:O
offseason:O
.:O