With no explanation, label each line with "O", "event-protest", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
was
instrumental
in
getting
the
charges
against
the
Homestead
Strike
participants
dropped
.
He:O
was:O
instrumental:O
in:O
getting:O
the:O
charges:O
against:O
the:event-protest
Homestead:event-protest
Strike:event-protest
participants:O
dropped:O
.:O