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 ":".
Two
RNA
species
with
tightly
regulated
secondary
structures
are
ribosomal
RNA
(
rRNA
)
and
transfer
RNA
(
tRNA
)
which
are
essential
in
translation
of
mRNA
to
protein
.
Two:O
RNA:other-biologything
species:O
with:O
tightly:O
regulated:O
secondary:O
structures:O
are:O
ribosomal:O
RNA:other-biologything
(:O
rRNA:other-biologything
):O
and:O
transfer:O
RNA:other-biologything
(:O
tRNA:other-biologything
):O
which:O
are:O
essential:O
in:O
translation:O
of:O
mRNA:other-biologything
to:O
protein:O
.:O