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 ":".
He
discovered
this
in
studies
of
the
epidermal
growth
factor
receptor
(
EGFR
)
.
He:O
discovered:O
this:O
in:O
studies:O
of:O
the:O
epidermal:other-biologything
growth:other-biologything
factor:other-biologything
receptor:other-biologything
(:O
EGFR:other-biologything
):O
.:O