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
methyl
side-chain
of
alanine
is
non-reactive
and
is
therefore
hardly
ever
directly
involved
in
protein
function
.
The:O
methyl:O
side-chain:O
of:O
alanine:other-biologything
is:O
non-reactive:O
and:O
is:O
therefore:O
hardly:O
ever:O
directly:O
involved:O
in:O
protein:O
function:O
.:O