With no explanation, label each line with "location-bodiesofwater", "O", "location-island", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
subsequent
Board
of
Inquiry
found
that
the
accident
was
caused
by
the
collapse
of
the
tephra
dam
holding
back
nearby
Mount
Ruapehu
's
crater
lake
,
creating
a
large
lahar
in
the
Whangaehu
River
,
which
destroyed
one
of
the
bridge
piers
at
Tangiwai
only
minutes
before
the
train
reached
the
bridge
.
The:O
subsequent:O
Board:O
of:O
Inquiry:O
found:O
that:O
the:O
accident:O
was:O
caused:O
by:O
the:O
collapse:O
of:O
the:O
tephra:O
dam:O
holding:O
back:O
nearby:O
Mount:location-mountain
Ruapehu:location-mountain
's:O
crater:O
lake:O
,:O
creating:O
a:O
large:O
lahar:O
in:O
the:O
Whangaehu:location-bodiesofwater
River:location-bodiesofwater
,:O
which:O
destroyed:O
one:O
of:O
the:O
bridge:O
piers:O
at:O
Tangiwai:location-island
only:O
minutes:O
before:O
the:O
train:O
reached:O
the:O
bridge:O
.:O