With no explanation, label each line with "O", "other-astronomything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
reflector
is
made
to
follow
the
sun
during
daylight
hours
by
tracking
along
a
single
axis
.
The:O
reflector:O
is:O
made:O
to:O
follow:O
the:O
sun:other-astronomything
during:O
daylight:O
hours:O
by:O
tracking:O
along:O
a:O
single:O
axis:O
.:O