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 ":".
As
of
2020
the
building
is
empty
.
As:O
of:O
2020:O
the:O
building:O
is:O
empty:O
.:O