With no explanation, label each line with "O", "event-disaster", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
next
most
serious
accident
was
the
Hyde
railway
disaster
of
1943
,
when
the
Cromwell
-
Dunedin
express
derailed
after
travelling
at
excessive
speed
.
The:O
next:O
most:O
serious:O
accident:O
was:O
the:O
Hyde:event-disaster
railway:event-disaster
disaster:event-disaster
of:event-disaster
1943:event-disaster
,:O
when:O
the:O
Cromwell:product-train
-:product-train
Dunedin:product-train
express:product-train
derailed:O
after:O
travelling:O
at:O
excessive:O
speed:O
.:O