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 ":".
Supernova
1987A
was
the
closest
supernova
to
occur
since
the
invention
of
the
telescope
.
Supernova:other-astronomything
1987A:other-astronomything
was:O
the:O
closest:O
supernova:O
to:O
occur:O
since:O
the:O
invention:O
of:O
the:O
telescope:O
.:O