With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Prime
Minister
Churchill
visited
him
there
.
Prime:O
Minister:O
Churchill:person-politician
visited:O
him:O
there:O
.:O