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 ":".
This
proved
reliable
and
smooth
,
but
under-powered
.
This:O
proved:O
reliable:O
and:O
smooth:O
,:O
but:O
under-powered:O
.:O