With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Its
main
selling
points
were
its
low
price
,
ease
of
maintenance
and
spacious
interior
.
Its:O
main:O
selling:O
points:O
were:O
its:O
low:O
price:O
,:O
ease:O
of:O
maintenance:O
and:O
spacious:O
interior:O
.:O