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 ":".
Two
communists
,
E.M.S
.
Two:O
communists:O
,:O
E.M.S:O
.:O