With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
He
also
surveyed
the
galaxy
's
stars
distribution
down
to
magnitude
19.4
.
He:O
also:O
surveyed:O
the:O
galaxy:O
's:O
stars:O
distribution:O
down:O
to:O
magnitude:O
19.4:O
.:O