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 ":".
They
cover
20
years
of
the
company
's
product
design
,
from
the
iMac
G3
released
in
1998
to
the
Apple
Pencil
released
in
2015
,
although
not
all
products
during
that
timeframe
are
included
.
They:O
cover:O
20:O
years:O
of:O
the:O
company:O
's:O
product:O
design:O
,:O
from:O
the:O
iMac:product-other
G3:product-other
released:O
in:O
1998:O
to:O
the:O
Apple:product-other
Pencil:product-other
released:O
in:O
2015:O
,:O
although:O
not:O
all:O
products:O
during:O
that:O
timeframe:O
are:O
included:O
.:O