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 ":".
It
was
federally
listed
as
endangered
species
of
the
United
States
in
1996
.
It:O
was:O
federally:O
listed:O
as:O
endangered:O
species:O
of:O
the:O
United:location-GPE
States:location-GPE
in:O
1996:O
.:O