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 ":".
These
signaling
pathways
are
important
in
tumor
angiogenesis
,
which
stimulates
tumor
growth
by
supplying
the
tumor
with
oxygen
and
nutrients
.
These:O
signaling:O
pathways:O
are:O
important:O
in:O
tumor:O
angiogenesis:O
,:O
which:O
stimulates:O
tumor:O
growth:O
by:O
supplying:O
the:O
tumor:O
with:O
oxygen:O
and:O
nutrients:O
.:O