With no explanation, label each line with "O", "location-road/railway/highway/transit", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Flood
waters
reached
a
depth
of
up
to
25
cm
along
Bukit
Timah
Road
and
Dunearn
Road
and
subsided
within
40
minutes
.
Flood:O
waters:O
reached:O
a:O
depth:O
of:O
up:O
to:O
25:O
cm:O
along:O
Bukit:location-road/railway/highway/transit
Timah:location-road/railway/highway/transit
Road:location-road/railway/highway/transit
and:O
Dunearn:location-road/railway/highway/transit
Road:location-road/railway/highway/transit
and:O
subsided:O
within:O
40:O
minutes:O
.:O