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 ":".
Although
the
Circinus
galaxy
can
be
seen
using
a
small
telescope
,
it
was
not
noticed
until
1977
because
it
lies
close
to
the
plane
of
the
Milky
Way
and
is
obscured
by
galactic
dust
.
Although:O
the:O
Circinus:other-astronomything
galaxy:other-astronomything
can:O
be:O
seen:O
using:O
a:O
small:O
telescope:O
,:O
it:O
was:O
not:O
noticed:O
until:O
1977:O
because:O
it:O
lies:O
close:O
to:O
the:O
plane:O
of:O
the:O
Milky:other-astronomything
Way:other-astronomything
and:O
is:O
obscured:O
by:O
galactic:O
dust:O
.:O