With no explanation, label each line with "O", "product-software", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
ALOS
was
used
to
analyze
several
disaster
sites
.
ALOS:product-software
was:O
used:O
to:O
analyze:O
several:O
disaster:O
sites:O
.:O