With no explanation, label each line with "person-athlete", "event-sportsevent", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Lindsay
Davenport
was
the
defending
champion
of
the
WTA
Tour
Championships
tennis
singles
tournament
,
but
lost
in
the
first
round
to
Elena
Dementieva
.
Lindsay:person-athlete
Davenport:person-athlete
was:O
the:O
defending:O
champion:O
of:O
the:O
WTA:event-sportsevent
Tour:event-sportsevent
Championships:event-sportsevent
tennis:O
singles:O
tournament:O
,:O
but:O
lost:O
in:O
the:O
first:O
round:O
to:O
Elena:person-athlete
Dementieva:person-athlete
.:O