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 ":".
Powder
mill
facilities
were
dismantled
,
and
the
property
was
sold
in
1924
.
Powder:O
mill:O
facilities:O
were:O
dismantled:O
,:O
and:O
the:O
property:O
was:O
sold:O
in:O
1924:O
.:O