With no explanation, label each line with "building-other", "O", "organization-company", "organization-other", "location-other", "person-other", "art-broadcastprogram", "art-film", "art-music" or "art-other" preceded by ":".
Industrialist
Henry
Clay
Frick
sent
private
security
agents
from
the
Pinkerton
National
Detective
Agency
to
break
the
Amalgamated
Association
of
Iron
and
Steel
Workers
strike
at
a
Homestead
,
Pennsylvania
steel
mill
.
Industrialist:O
Henry:person-other
Clay:person-other
Frick:person-other
sent:O
private:O
security:O
agents:O
from:O
the:O
Pinkerton:building-other
National:building-other
Detective:building-other
Agency:building-other
to:O
break:O
the:O
Amalgamated:organization-other
Association:organization-other
of:organization-other
Iron:organization-other
and:O
Steel:O
Workers:O
strike:O
at:O
a:O
Homestead:location-other
,:O
Pennsylvania:organization-company
steel:organization-company
mill:organization-company
.:O