With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
study
involved
900
white
people
in
Australia
and
required
some
of
them
to
apply
a
broad-spectrum
sunscreen
every
day
for
four
and
a
half
years
.
The:O
study:O
involved:O
900:O
white:O
people:O
in:O
Australia:location-GPE
and:O
required:O
some:O
of:O
them:O
to:O
apply:O
a:O
broad-spectrum:O
sunscreen:O
every:O
day:O
for:O
four:O
and:O
a:O
half:O
years:O
.:O