With no explanation, label each line with "O", "person-athlete", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
By
winning
her
seventh
Wimbledon
title
,
Williams
equaled
Steffi
Graf
'
s
Open
Era
record
of
22
major
singles
titles
.
By:O
winning:O
her:O
seventh:O
Wimbledon:event-sportsevent
title:O
,:O
Williams:person-athlete
equaled:O
Steffi:person-athlete
Graf:person-athlete
':person-athlete
s:O
Open:O
Era:O
record:O
of:O
22:O
major:O
singles:O
titles:O
.:O