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 ":".
Grb2
is
best
known
for
its
ability
to
link
the
epidermal
growth
factor
receptor
tyrosine
kinase
to
the
activation
of
Ras
and
its
downstream
kinases
,
ERK1,2
.
Grb2:other-biologything
is:O
best:O
known:O
for:O
its:O
ability:O
to:O
link:O
the:O
epidermal:O
growth:O
factor:O
receptor:O
tyrosine:other-biologything
kinase:other-biologything
to:O
the:O
activation:O
of:O
Ras:other-biologything
and:O
its:O
downstream:O
kinases:other-biologything
,:O
ERK1,2:other-biologything
.:O