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 ":".
Thousands
of
trees
were
downed
across
the
area
,
and
power
was
knocked
out
to
hundreds
of
thousands
of
residents
.
Thousands:O
of:O
trees:O
were:O
downed:O
across:O
the:O
area:O
,:O
and:O
power:O
was:O
knocked:O
out:O
to:O
hundreds:O
of:O
thousands:O
of:O
residents:O
.:O