With no explanation, label each line with "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
main
goals
of
the
PT-17
tank
were
to
increase
firepower
and
fire
maneuverability
,
increase
mobility
and
survivability
on
the
battlefield
,
improve
crew
comfort
and
increase
mission
duration
.
The:O
main:O
goals:O
of:O
the:O
PT-17:product-weapon
tank:O
were:O
to:O
increase:O
firepower:O
and:O
fire:O
maneuverability:O
,:O
increase:O
mobility:O
and:O
survivability:O
on:O
the:O
battlefield:O
,:O
improve:O
crew:O
comfort:O
and:O
increase:O
mission:O
duration:O
.:O