With no explanation, label each line with "product-car", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
British
Rail
Class
206
or
3R
was
a
type
of
Diesel-electric
multiple
unit
(
DEMU
)
,
introduced
in
1964
.
The:O
British:product-car
Rail:product-car
Class:product-car
206:product-car
or:O
3R:product-car
was:O
a:O
type:O
of:O
Diesel-electric:O
multiple:O
unit:O
(:O
DEMU:O
):O
,:O
introduced:O
in:O
1964:O
.:O