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 ":".
Messier
7
is
a
naked-eye
open
cluster
.
Messier:other-astronomything
7:other-astronomything
is:O
a:O
naked-eye:O
open:O
cluster:O
.:O