With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
In
the
early
20th
century
large
bore
shotguns
and
rifles
were
used
.
In:O
the:O
early:O
20th:O
century:O
large:O
bore:O
shotguns:O
and:O
rifles:O
were:O
used:O
.:O