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 ":".
Planned
GCV
prototypes
were
heavy
,
weighing
up
to
84
tons
,
to
be
better
protected
and
seat
a
nine-man
squad
.
Planned:O
GCV:product-weapon
prototypes:O
were:O
heavy:O
,:O
weighing:O
up:O
to:O
84:O
tons:O
,:O
to:O
be:O
better:O
protected:O
and:O
seat:O
a:O
nine-man:O
squad:O
.:O