With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Riot
police
arrived
and
serious
fighting
continued
sporadically
for
the
rest
of
the
day
until
the
fishermen
dispersed
around
9
pm
.
Riot:O
police:O
arrived:O
and:O
serious:O
fighting:O
continued:O
sporadically:O
for:O
the:O
rest:O
of:O
the:O
day:O
until:O
the:O
fishermen:O
dispersed:O
around:O
9:O
pm:O
.:O