With no explanation, label each line with "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
pair
appeared
together
in
the
1996
US
Open
and
1997
French
Open
,
but
only
won
one
match
,
in
the
former
.
The:O
pair:O
appeared:O
together:O
in:O
the:O
1996:event-sportsevent
US:event-sportsevent
Open:event-sportsevent
and:O
1997:event-sportsevent
French:event-sportsevent
Open:event-sportsevent
,:O
but:O
only:O
won:O
one:O
match:O
,:O
in:O
the:O
former:O
.:O