With no explanation, label each line with "O", "location-bodiesofwater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
skytrain
extension
to
the
other
side
of
Chao
Phraya
River
opened
to
public
in
May
2009
.
The:O
skytrain:O
extension:O
to:O
the:O
other:O
side:O
of:O
Chao:location-bodiesofwater
Phraya:location-bodiesofwater
River:location-bodiesofwater
opened:O
to:O
public:O
in:O
May:O
2009:O
.:O