With no explanation, label each line with "location-GPE", "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Hanretty
and
American
ice
dancer
Christina
Chitwood
decided
to
team
up
on
31
December
2005
and
began
training
together
properly
in
May
2006
.
Hanretty:person-artist/author
and:O
American:location-GPE
ice:O
dancer:O
Christina:person-artist/author
Chitwood:person-artist/author
decided:O
to:O
team:O
up:O
on:O
31:O
December:O
2005:O
and:O
began:O
training:O
together:O
properly:O
in:O
May:O
2006:O
.:O