With no explanation, label each line with "organization-media/newspaper", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
His
political
opinions
eventually
led
Backhouse
to
become
one
of
the
original
seven
founders
of
the
Radical-run
Sunderland
Echo
in
1873
.
His:O
political:O
opinions:O
eventually:O
led:O
Backhouse:person-politician
to:O
become:O
one:O
of:O
the:O
original:O
seven:O
founders:O
of:O
the:O
Radical-run:organization-media/newspaper
Sunderland:organization-media/newspaper
Echo:organization-media/newspaper
in:O
1873:O
.:O