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 ":".
NGC
6939
is
located
near
the
border
of
the
constellations
Cepheus
and
Cygnus
,
at
the
southwest
corner
of
Cepheus
.
NGC:other-astronomything
6939:other-astronomything
is:O
located:O
near:O
the:O
border:O
of:O
the:O
constellations:O
Cepheus:other-astronomything
and:O
Cygnus:other-astronomything
,:O
at:O
the:O
southwest:O
corner:O
of:O
Cepheus:other-astronomything
.:O