With no explanation, label each line with "O", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
first
Global
Marijuana
March
was
held
in
1999
.
The:O
first:O
Global:event-other
Marijuana:event-other
March:event-other
was:O
held:O
in:O
1999:O
.:O