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 ":".
Every
year
The
Shield
is
contested
in
a
number
of
professional
or
major
college
stadiums
.
Every:O
year:O
The:event-sportsevent
Shield:event-sportsevent
is:O
contested:O
in:O
a:O
number:O
of:O
professional:O
or:O
major:O
college:O
stadiums:O
.:O