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 ":".
Some
critics
described
it
as
memorable
.
Some:O
critics:O
described:O
it:O
as:O
memorable:O
.:O