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 ":".
The
squat
effect
phenomenon
is
believed
to
be
a
factor
in
the
collision
.
The:O
squat:O
effect:O
phenomenon:O
is:O
believed:O
to:O
be:O
a:O
factor:O
in:O
the:O
collision:O
.:O