With no explanation, label each line with "other-disease", "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
On
August
31
,
the
2020
US
Open
(
tennis
)
kicked
off
with
various
safety
precautions
and
void
of
spectators
due
to
COVID-19
,
for
the
first
time
in
the
tournament
's
history
.
On:O
August:O
31:O
,:O
the:O
2020:event-sportsevent
US:event-sportsevent
Open:event-sportsevent
(:O
tennis:O
):O
kicked:O
off:O
with:O
various:O
safety:O
precautions:O
and:O
void:O
of:O
spectators:O
due:O
to:O
COVID-19:other-disease
,:O
for:O
the:O
first:O
time:O
in:O
the:O
tournament:O
's:O
history:O
.:O