With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Where
radial
engines
have
used
sleeve
valves
(
notably
those
of
the
Bristol
Engine
Company
)
,
the
junk
head
was
the
usual
design
of
head
.
Where:O
radial:O
engines:O
have:O
used:O
sleeve:O
valves:O
(:O
notably:O
those:O
of:O
the:O
Bristol:organization-company
Engine:organization-company
Company:organization-company
):O
,:O
the:O
junk:O
head:O
was:O
the:O
usual:O
design:O
of:O
head:O
.:O