With no explanation, label each line with "product-car", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
Pontiac
GTO
is
considered
by
some
to
have
started
the
trend
with
all
four
domestic
automakers
offering
a
variety
of
competing
models
.
The:O
Pontiac:product-car
GTO:product-car
is:O
considered:O
by:O
some:O
to:O
have:O
started:O
the:O
trend:O
with:O
all:O
four:O
domestic:O
automakers:O
offering:O
a:O
variety:O
of:O
competing:O
models:O
.:O