With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Folic
acid
supplementation
is
not
effective
in
preventing
colon
cancer
and
may
increase
colon
polyps
.
Folic:other-biologything
acid:other-biologything
supplementation:O
is:O
not:O
effective:O
in:O
preventing:O
colon:O
cancer:O
and:O
may:O
increase:O
colon:O
polyps:O
.:O