With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Voters
of
the
50
U.S
.
states
chose
435
U.S
.
Voters:O
of:O
the:O
50:O
U.S:location-GPE
.:location-GPE
states:O
chose:O
435:O
U.S:O
.:O