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 ":".
Some
Android
users
reviewed
it
as
one
of
the
best
building
tycoon
games
.
Some:O
Android:product-software
users:O
reviewed:O
it:O
as:O
one:O
of:O
the:O
best:O
building:O
tycoon:O
games:O
.:O