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 ":".
By
this
time
,
the
Opel
Kadett
had
been
changed
to
front
wheel
drive
and
no
longer
resembled
the
original
Kadett
C
.
By:O
this:O
time:O
,:O
the:O
Opel:product-car
Kadett:product-car
had:O
been:O
changed:O
to:O
front:O
wheel:O
drive:O
and:O
no:O
longer:O
resembled:O
the:O
original:O
Kadett:product-car
C:product-car
.:O