With no explanation, label each line with "O", "organization-sportsleague", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
1921–22
Western
Football
League
season
was
the
25th
in
the
history
of
the
Western
Football
League
.
The:O
1921–22:O
Western:organization-sportsleague
Football:organization-sportsleague
League:organization-sportsleague
season:O
was:O
the:O
25th:O
in:O
the:O
history:O
of:O
the:O
Western:organization-sportsleague
Football:organization-sportsleague
League:organization-sportsleague
.:O