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 ":".
For
these
reasons
,
and
because
of
the
important
role
it
has
repeatedly
played
in
the
modern
era
,
SN
1054
is
one
of
the
best
known
supernovae
in
the
history
of
astronomy
.
For:O
these:O
reasons:O
,:O
and:O
because:O
of:O
the:O
important:O
role:O
it:O
has:O
repeatedly:O
played:O
in:O
the:O
modern:O
era:O
,:O
SN:other-astronomything
1054:other-astronomything
is:O
one:O
of:O
the:O
best:O
known:O
supernovae:O
in:O
the:O
history:O
of:O
astronomy:O
.:O