With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
M2
has
been
shown
to
be
evolutionary
conserved
,
and
,
through
mutagenesis
,
it
was
shown
that
this
stem
loop
structure
acts
as
a
RNA
destabilizing
element
.
M2:O
has:O
been:O
shown:O
to:O
be:O
evolutionary:O
conserved:O
,:O
and:O
,:O
through:O
mutagenesis:O
,:O
it:O
was:O
shown:O
that:O
this:O
stem:O
loop:O
structure:O
acts:O
as:O
a:O
RNA:other-biologything
destabilizing:O
element:O
.:O