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 ":".
The
perpetrator
,
19-year-old
Nathan
Dunlap
,
a
former
employee
of
the
restaurant
,
was
frustrated
about
being
fired
five
months
prior
to
the
shooting
and
sought
revenge
by
committing
the
attack
.
The:O
perpetrator:O
,:O
19-year-old:O
Nathan:person-other
Dunlap:person-other
,:O
a:O
former:O
employee:O
of:O
the:O
restaurant:O
,:O
was:O
frustrated:O
about:O
being:O
fired:O
five:O
months:O
prior:O
to:O
the:O
shooting:O
and:O
sought:O
revenge:O
by:O
committing:O
the:O
attack:O
.:O