With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
suffered
the
car
accident
shortly
after
returning
from
a
trip
to
Europe
in
July
2009
,
and
had
been
hospitalized
on
several
occasions
since
the
accident
.
He:O
suffered:O
the:O
car:O
accident:O
shortly:O
after:O
returning:O
from:O
a:O
trip:O
to:O
Europe:location-GPE
in:O
July:O
2009:O
,:O
and:O
had:O
been:O
hospitalized:O
on:O
several:O
occasions:O
since:O
the:O
accident:O
.:O