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 ":".
It
illuminates
a
small
reflection
nebula
against
the
dark
cloud
.
It:O
illuminates:O
a:O
small:O
reflection:O
nebula:O
against:O
the:O
dark:O
cloud:O
.:O