With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
External
HDDs
remained
popular
for
much
longer
on
the
Apple
Macintosh
.
External:O
HDDs:product-other
remained:O
popular:O
for:O
much:O
longer:O
on:O
the:O
Apple:product-other
Macintosh:product-other
.:O