With no explanation, label each line with "O", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
river
cuts
between
several
mountains
at
this
point
,
including
Rich
Mountain
to
the
south
and
Buffalo
Mountain
to
the
north
.
The:O
river:O
cuts:O
between:O
several:O
mountains:O
at:O
this:O
point:O
,:O
including:O
Rich:location-mountain
Mountain:location-mountain
to:O
the:O
south:O
and:O
Buffalo:location-mountain
Mountain:location-mountain
to:O
the:O
north:O
.:O