With no explanation, label each line with "person-athlete", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Murray
retained
the
top
ranking
despite
losing
to
Mischa
Zverev
in
the
fourth
round
,
because
second
seeded
Djokovic
needed
to
win
the
tournament
to
regain
the
No
.
Murray:person-athlete
retained:O
the:O
top:O
ranking:O
despite:O
losing:O
to:O
Mischa:person-athlete
Zverev:person-athlete
in:O
the:O
fourth:O
round:O
,:O
because:O
second:O
seeded:O
Djokovic:person-athlete
needed:O
to:O
win:O
the:O
tournament:O
to:O
regain:O
the:O
No:O
.:O