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 ":".
His
heirs
contested
,
and
the
matter
was
tied
up
in
litigation
for
a
long
time
.
His:O
heirs:O
contested:O
,:O
and:O
the:O
matter:O
was:O
tied:O
up:O
in:O
litigation:O
for:O
a:O
long:O
time:O
.:O