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
served
two
one-year
terms
and
then
left
office
for
one
year
.
He:O
served:O
two:O
one-year:O
terms:O
and:O
then:O
left:O
office:O
for:O
one:O
year:O
.:O