With no explanation, label each line with "O", "organization-sportsteam", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
However
,
Celtic
scored
before
half-time
and
again
in
the
second
half
to
win
3–1
on
aggregate
.
However:O
,:O
Celtic:organization-sportsteam
scored:O
before:O
half-time:O
and:O
again:O
in:O
the:O
second:O
half:O
to:O
win:O
3–1:O
on:O
aggregate:O
.:O