With no explanation, label each line with "O", "person-athlete", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
then
faced
McEnroe
again
in
the
final
of
the
US
Open
,
winning
in
straight
sets
.
He:O
then:O
faced:O
McEnroe:person-athlete
again:O
in:O
the:O
final:O
of:O
the:O
US:event-sportsevent
Open:event-sportsevent
,:O
winning:O
in:O
straight:O
sets:O
.:O