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 ":".
A
mutation
in
the
middle
of
the
endothelin
receptor
type
B
(
``
EDNRB
''
)
gene
causes
lethal
white
syndrome
when
homozygous
.
A:O
mutation:O
in:O
the:O
middle:O
of:O
the:O
endothelin:O
receptor:O
type:O
B:O
(:O
``:O
EDNRB:O
'':O
):O
gene:O
causes:O
lethal:O
white:O
syndrome:O
when:O
homozygous:O
.:O