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
only
other
two
exoplanets
thought
to
be
darker
than
WASP-104b
are
TrES-2b
and
WASP-12b
.
The:O
only:O
other:O
two:O
exoplanets:O
thought:O
to:O
be:O
darker:O
than:O
WASP-104b:O
are:O
TrES-2b:other-astronomything
and:O
WASP-12b:other-astronomything
.:O