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 ":".
Until
2012
,
its
format
remained
unique
among
PGA
Tour
events
,
being
played
over
five
days
and
four
different
courses
.
Until:O
2012:O
,:O
its:O
format:O
remained:O
unique:O
among:O
PGA:event-sportsevent
Tour:event-sportsevent
events:event-sportsevent
,:O
being:O
played:O
over:O
five:O
days:O
and:O
four:O
different:O
courses:O
.:O