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 ":".
Since
then
,
he
developed
a
frequent
and
recurring
collaboration
with
the
Maggio
Musicale
Fiorentino
Festival
.
Since:O
then:O
,:O
he:O
developed:O
a:O
frequent:O
and:O
recurring:O
collaboration:O
with:O
the:O
Maggio:event-other
Musicale:event-other
Fiorentino:event-other
Festival:event-other
.:O