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 ":".
He
made
his
Belgian
Pro
League
début
in
a
game
against
R.A.E.C
.
He:O
made:O
his:O
Belgian:event-sportsevent
Pro:event-sportsevent
League:event-sportsevent
début:O
in:O
a:O
game:O
against:O
R.A.E.C:O
.:O