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 ":".
Following
his
unexpected
victory
in
the
1997
French
Open
-
which
was
not
only
his
maiden
ATP
Tour
victory
but
also
the
first
time
he
had
reached
a
professional
ranking
final
-
Kuerten
had
a
difficult
year
and
a
half
,
adjusting
to
his
sudden
fame
and
the
pressure
of
being
expected
to
win
.
Following:O
his:O
unexpected:O
victory:O
in:O
the:O
1997:event-sportsevent
French:event-sportsevent
Open:event-sportsevent
-:O
which:O
was:O
not:O
only:O
his:O
maiden:O
ATP:event-sportsevent
Tour:event-sportsevent
victory:O
but:O
also:O
the:O
first:O
time:O
he:O
had:O
reached:O
a:O
professional:O
ranking:O
final:O
-:O
Kuerten:person-athlete
had:O
a:O
difficult:O
year:O
and:O
a:O
half:O
,:O
adjusting:O
to:O
his:O
sudden:O
fame:O
and:O
the:O
pressure:O
of:O
being:O
expected:O
to:O
win:O
.:O