With no explanation, label each line with "location-GPE", "O", "person-artist/author", "art-music", "art-broadcastprogram", "art-film", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
At
the
show
in
Porto
Alegre
on
November
11
,
the
band
covered
Pink
Floyd
's
song
``
Comfortably
Numb
``
for
the
first
time
.
At:O
the:O
show:O
in:O
Porto:location-GPE
Alegre:location-GPE
on:O
November:O
11:O
,:O
the:O
band:O
covered:O
Pink:person-artist/author
Floyd:person-artist/author
's:O
song:O
``:O
Comfortably:art-music
Numb:art-music
``:O
for:O
the:O
first:O
time:O
.:O