With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
After
Spoonman
went
back
on
air
,
he
explained
it
was
the
first
time
no
callers
had
called
up
.
After:O
Spoonman:person-other
went:O
back:O
on:O
air:O
,:O
he:O
explained:O
it:O
was:O
the:O
first:O
time:O
no:O
callers:O
had:O
called:O
up:O
.:O