With no explanation, label each line with "location-GPE", "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
is
also
the
second
Argentine
and
the
fifth-youngest
man
to
win
the
US
Open
in
the
Open
Era
.
He:O
is:O
also:O
the:O
second:O
Argentine:location-GPE
and:O
the:O
fifth-youngest:O
man:O
to:O
win:O
the:O
US:event-sportsevent
Open:event-sportsevent
in:O
the:O
Open:event-sportsevent
Era:event-sportsevent
.:O