With no explanation, label each line with "O", "product-software", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
This
requires
Mac
OS
9
to
be
installed
on
the
computer
even
though
computers
that
can
run
the
Classic
environment
are
not
necessarily
able
to
boot
into
Mac
OS
9
.
This:O
requires:O
Mac:product-software
OS:product-software
9:product-software
to:O
be:O
installed:O
on:O
the:O
computer:O
even:O
though:O
computers:O
that:O
can:O
run:O
the:O
Classic:O
environment:O
are:O
not:O
necessarily:O
able:O
to:O
boot:O
into:O
Mac:product-software
OS:product-software
9:product-software
.:O