With no explanation, label each line with "product-game", "O", "product-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
``
Champions
``
,
originally
published
as
a
stand-alone
game
in
1981
,
was
the
catalyst
for
the
creation
of
the
Hero
System
.
``:O
Champions:product-game
``:O
,:O
originally:O
published:O
as:O
a:O
stand-alone:O
game:O
in:O
1981:O
,:O
was:O
the:O
catalyst:O
for:O
the:O
creation:O
of:O
the:O
Hero:product-other
System:product-other
.:O