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 ":".
American
reviews
were
also
mixed
.
American:location-GPE
reviews:O
were:O
also:O
mixed:O
.:O