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 ":".
Some
were
little
more
than
stopgap
solutions
,
mounting
an
anti-tank
gun
on
a
tracked
vehicle
to
give
mobility
,
while
others
were
more
sophisticated
designs
.
Some:O
were:O
little:O
more:O
than:O
stopgap:O
solutions:O
,:O
mounting:O
an:O
anti-tank:O
gun:O
on:O
a:O
tracked:O
vehicle:O
to:O
give:O
mobility:O
,:O
while:O
others:O
were:O
more:O
sophisticated:O
designs:O
.:O