With no explanation, label each line with "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
participated
in
anti-Vietnam
War
and
civil
rights
activism
.
He:O
participated:O
in:O
anti-Vietnam:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
and:O
civil:O
rights:O
activism:O
.:O