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 ":".
Over
the
years
,
he
used
its
profits
to
acquire
more
than
1,000
run-down
apartment
buildings
.
Over:O
the:O
years:O
,:O
he:O
used:O
its:O
profits:O
to:O
acquire:O
more:O
than:O
1,000:O
run-down:O
apartment:O
buildings:O
.:O