With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
A
mourning
day
was
observed
in
Dera
Ismail
Khan
on
26
November
in
condemnation
of
the
attack
.
A:O
mourning:O
day:O
was:O
observed:O
in:O
Dera:location-GPE
Ismail:location-GPE
Khan:location-GPE
on:O
26:O
November:O
in:O
condemnation:O
of:O
the:O
attack:O
.:O