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 ":".
He
became
a
restricted
free
agent
after
the
season
.
He:O
became:O
a:O
restricted:O
free:O
agent:O
after:O
the:O
season:O
.:O