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 ":".
The
1972–1973
Algerian
Championnat
National
was
the
11th
season
of
the
Algerian
Championnat
National
since
its
establishment
in
1962
.
The:O
1972–1973:O
Algerian:event-sportsevent
Championnat:event-sportsevent
National:event-sportsevent
was:O
the:O
11th:O
season:O
of:O
the:O
Algerian:event-sportsevent
Championnat:event-sportsevent
National:event-sportsevent
since:O
its:O
establishment:O
in:O
1962:O
.:O