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 ":".
AP-1
is
a
dimer
and
is
composed
of
c-Jun
and
c-Fos
proteins
.
AP-1:other-biologything
is:O
a:O
dimer:other-biologything
and:O
is:O
composed:O
of:O
c-Jun:other-biologything
and:O
c-Fos:other-biologything
proteins:O
.:O