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 ":".
Elena
Dementieva
recorded
her
first
ever
win
over
Serena
Williams
to
win
her
home
event
in
Moscow
.
Elena:person-athlete
Dementieva:person-athlete
recorded:O
her:O
first:O
ever:O
win:O
over:O
Serena:person-athlete
Williams:person-athlete
to:O
win:O
her:O
home:O
event:O
in:O
Moscow:location-GPE
.:O