With no explanation, label each line with "organization-media/newspaper", "art-broadcastprogram", "O", "event-disaster", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Weather
Channel
produced
an
episode
of
``
When
Weather
Changed
History
``
on
the
Donora
smog
incident
.
The:O
Weather:organization-media/newspaper
Channel:organization-media/newspaper
produced:O
an:O
episode:O
of:O
``:O
When:art-broadcastprogram
Weather:art-broadcastprogram
Changed:art-broadcastprogram
History:art-broadcastprogram
``:O
on:O
the:O
Donora:event-disaster
smog:event-disaster
incident:O
.:O