With no explanation, label each line with "O", "event-sportsevent", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
was
the
first
edition
of
La
Madrid
Challenge
by
La
Vuelta
.
It:O
was:O
the:O
first:O
edition:O
of:O
La:event-sportsevent
Madrid:event-sportsevent
Challenge:event-sportsevent
by:O
La:person-other
Vuelta:person-other
.:O