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 ":".
Tipsarević
also
won
the
2001
Australian
Open
junior
title
.
Tipsarević:person-athlete
also:O
won:O
the:O
2001:O
Australian:event-sportsevent
Open:event-sportsevent
junior:O
title:O
.:O