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 ":".
The
lysine
chain
then
makes
a
nucleophilic
attack
on
the
methyl
group
on
the
sulfur
atom
of
the
SAM
molecule
,
transferring
the
methyl
group
to
the
lysine
side
chain
.
The:O
lysine:O
chain:O
then:O
makes:O
a:O
nucleophilic:O
attack:O
on:O
the:O
methyl:O
group:O
on:O
the:O
sulfur:O
atom:O
of:O
the:O
SAM:other-biologything
molecule:O
,:O
transferring:O
the:O
methyl:O
group:O
to:O
the:O
lysine:O
side:O
chain:O
.:O