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 ":".
However
,
many
asteroids
are
very
dark
and
the
ones
that
are
near
the
Sun
are
much
harder
to
detect
from
Earth
-based
telescopes
which
observe
at
night
,
and
thus
face
away
from
the
Sun
.
However:O
,:O
many:O
asteroids:O
are:O
very:O
dark:O
and:O
the:O
ones:O
that:O
are:O
near:O
the:O
Sun:other-astronomything
are:O
much:O
harder:O
to:O
detect:O
from:O
Earth:other-astronomything
-based:O
telescopes:O
which:O
observe:O
at:O
night:O
,:O
and:O
thus:O
face:O
away:O
from:O
the:O
Sun:other-astronomything
.:O