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 ":".
After
studies
were
conducted
,
plans
were
drawn
up
by
the
U.S
.
After:O
studies:O
were:O
conducted:O
,:O
plans:O
were:O
drawn:O
up:O
by:O
the:O
U.S:O
.:O