With no explanation, label each line with "location-GPE", "O", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
While
also
at
the
NSC
,
he
helped
plan
the
U.S
.
invasion
of
Grenada
and
the
1986
bombing
of
Libya
.
While:O
also:O
at:O
the:O
NSC:organization-government/governmentagency
,:O
he:O
helped:O
plan:O
the:O
U.S:location-GPE
.:location-GPE
invasion:O
of:O
Grenada:location-GPE
and:O
the:O
1986:O
bombing:O
of:O
Libya:location-GPE
.:O