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 ":".
It
is
found
at
the
eastern
end
of
the
belt
,
south
west
of
Alnitak
and
west
of
the
Horsehead
Nebula
which
it
partially
illuminates
.
It:O
is:O
found:O
at:O
the:O
eastern:O
end:O
of:O
the:O
belt:O
,:O
south:O
west:O
of:O
Alnitak:other-astronomything
and:O
west:O
of:O
the:O
Horsehead:other-astronomything
Nebula:other-astronomything
which:O
it:O
partially:O
illuminates:O
.:O