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
began
to
write
poems
and
plays
at
age
13
.
He:O
began:O
to:O
write:O
poems:O
and:O
plays:O
at:O
age:O
13:O
.:O