With no explanation, label each line with "O", "location-island", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
A/MH-6
Little
Birds
were
used
during
the
1983
invasion
of
Grenada
to
evacuate
casualties
onto
naval
ship
decks
.
A/MH-6:O
Little:O
Birds:O
were:O
used:O
during:O
the:O
1983:O
invasion:O
of:O
Grenada:location-island
to:O
evacuate:O
casualties:O
onto:O
naval:O
ship:O
decks:O
.:O