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 ":".
Known
targets
of
these
methyltransferases
in
humans
include
RCC-1
(
a
regulator
of
nuclear
transport
proteins
)
and
Retinoblastoma
protein
(
a
tumor
suppressor
protein
that
inhibits
excessive
cell
division
)
.
Known:O
targets:O
of:O
these:O
methyltransferases:other-biologything
in:O
humans:O
include:O
RCC-1:other-biologything
(:O
a:O
regulator:O
of:O
nuclear:O
transport:O
proteins:O
):O
and:O
Retinoblastoma:other-biologything
protein:other-biologything
(:O
a:O
tumor:O
suppressor:O
protein:O
that:O
inhibits:O
excessive:O
cell:O
division:O
):O
.:O