With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
He
began
playing
professionally
in
the
early
1990s
and
eventually
specialised
in
doubles
,
in
which
he
reached
160
in
the
world
.
He:O
began:O
playing:O
professionally:O
in:O
the:O
early:O
1990s:O
and:O
eventually:O
specialised:O
in:O
doubles:O
,:O
in:O
which:O
he:O
reached:O
160:O
in:O
the:O
world:O
.:O