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 ":".
In
Mac
OS
X
v10.4
,
X11
.app
was
an
optional
install
included
on
the
install
DVD
.
In:O
Mac:product-software
OS:product-software
X:product-software
v10.4:product-software
,:O
X11:product-software
.app:O
was:O
an:O
optional:O
install:O
included:O
on:O
the:O
install:O
DVD:product-software
.:O