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 ":".
A
similar
system
is
used
by
the
Opera
Mini
browser
available
for
most
current
mobile
phones
.
A:O
similar:O
system:O
is:O
used:O
by:O
the:O
Opera:product-software
Mini:product-software
browser:O
available:O
for:O
most:O
current:O
mobile:O
phones:O
.:O