With no explanation, label each line with "location-GPE", "person-athlete", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
American
Carol
Heiss
was
the
first
woman
to
perform
a
double
Axel
,
in
1953
.
American:location-GPE
Carol:person-athlete
Heiss:person-athlete
was:O
the:O
first:O
woman:O
to:O
perform:O
a:O
double:O
Axel:O
,:O
in:O
1953:O
.:O