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
Ibar
River
flows
on
the
western
side
of
the
mountain
.
The:O
Ibar:location-bodiesofwater
River:location-bodiesofwater
flows:O
on:O
the:O
western:O
side:O
of:O
the:O
mountain:O
.:O