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 ":".
In
late
1971
the
new
Mazda
RX-3
became
the
GT-R
's
main
rival
.
In:O
late:O
1971:O
the:O
new:O
Mazda:product-car
RX-3:product-car
became:O
the:O
GT-R:product-car
's:O
main:O
rival:O
.:O