With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Both
return
for
their
senior
season
in
2008
.
Both:O
return:O
for:O
their:O
senior:O
season:O
in:O
2008:O
.:O