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 ":".
Service
numbers
(
area
codes
800
,
900
,
906
and
909
)
have
either
4
or
7
remaining
digits
,
making
them
8
or
11
digits
in
total
:
``
0AAA-BBBB
''
or
``
0AAA-BBBBBBB
''
.
Service:O
numbers:O
(:O
area:O
codes:O
800:O
,:O
900:O
,:O
906:O
and:O
909:O
):O
have:O
either:O
4:O
or:O
7:O
remaining:O
digits:O
,:O
making:O
them:O
8:O
or:O
11:O
digits:O
in:O
total:O
::O
``:O
0AAA-BBBB:O
'':O
or:O
``:O
0AAA-BBBBBBB:O
'':O
.:O