With no explanation, label each line with "organization-sportsteam", "person-athlete", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Milan
then
advanced
into
the
fourth
round
where
Crotone
was
defeated
after
extra
time
.
Milan:organization-sportsteam
then:O
advanced:O
into:O
the:O
fourth:O
round:O
where:O
Crotone:person-athlete
was:O
defeated:O
after:O
extra:O
time:O
.:O