With no explanation, label each line with "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
was
race
2
of
8
in
both
the
1961
World
Championship
of
Drivers
and
the
1961
International
Cup
for
Formula
One
Manufacturers
.
It:O
was:O
race:O
2:O
of:O
8:O
in:O
both:O
the:O
1961:event-sportsevent
World:event-sportsevent
Championship:event-sportsevent
of:event-sportsevent
Drivers:event-sportsevent
and:O
the:O
1961:event-sportsevent
International:event-sportsevent
Cup:event-sportsevent
for:event-sportsevent
Formula:event-sportsevent
One:event-sportsevent
Manufacturers:event-sportsevent
.:O