With no explanation, label each line with "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
They
were
required
by
the
Road
Records
Association
to
make
riders
``
inconspicuous
.
''
They:O
were:O
required:O
by:O
the:O
Road:organization-other
Records:organization-other
Association:organization-other
to:O
make:O
riders:O
``:O
inconspicuous:O
.:O
'':O