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 ":".
It
is
surrounded
by
a
vast
area
of
woods
leading
to
the
edge
of
the
summit
of
Mount
Monadnock
,
and
from
its
surface
the
summit
and
northwest
sides
of
the
mountain
.
It:O
is:O
surrounded:O
by:O
a:O
vast:O
area:O
of:O
woods:O
leading:O
to:O
the:O
edge:O
of:O
the:O
summit:O
of:O
Mount:location-mountain
Monadnock:location-mountain
,:O
and:O
from:O
its:O
surface:O
the:O
summit:O
and:O
northwest:O
sides:O
of:O
the:O
mountain:O
.:O