With no explanation, label each line with "O", "other-astronomything", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
star
was
chosen
as
it
was
thought
that
light
from
Arcturus
had
started
its
journey
at
about
the
time
of
the
previous
Chicago
World
's
Fair
in
1893
(
at
36.7
light-years
away
,
the
light
actually
started
in
1896
)
.
The:O
star:O
was:O
chosen:O
as:O
it:O
was:O
thought:O
that:O
light:O
from:O
Arcturus:other-astronomything
had:O
started:O
its:O
journey:O
at:O
about:O
the:O
time:O
of:O
the:O
previous:O
Chicago:event-other
World:event-other
's:event-other
Fair:event-other
in:O
1893:O
(:O
at:O
36.7:O
light-years:O
away:O
,:O
the:O
light:O
actually:O
started:O
in:O
1896:O
):O
.:O