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
the
case
of
X
Window
System
or
Wayland
,
the
shell
consists
of
an
X
window
manager
or
a
Wayland
compositor
,
respectively
,
as
well
as
of
one
or
multiple
programs
providing
the
functionality
to
start
installed
applications
,
to
manage
open
windows
and
virtual
desktops
,
and
often
to
support
a
widget
engine
.
In:O
the:O
case:O
of:O
X:product-software
Window:product-software
System:product-software
or:O
Wayland:product-software
,:O
the:O
shell:O
consists:O
of:O
an:O
X:product-software
window:product-software
manager:O
or:O
a:O
Wayland:product-software
compositor:O
,:O
respectively:O
,:O
as:O
well:O
as:O
of:O
one:O
or:O
multiple:O
programs:O
providing:O
the:O
functionality:O
to:O
start:O
installed:O
applications:O
,:O
to:O
manage:O
open:O
windows:O
and:O
virtual:O
desktops:O
,:O
and:O
often:O
to:O
support:O
a:O
widget:O
engine:O
.:O