With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
2,4-D
is
broken
down
by
microbes
in
soil
,
in
processes
that
involve
hydroxylation
,
cleavage
of
the
acid
side-chain
,
decarboxylation
,
and
ring
opening
.
2,4-D:other-chemicalthing
is:O
broken:O
down:O
by:O
microbes:O
in:O
soil:O
,:O
in:O
processes:O
that:O
involve:O
hydroxylation:O
,:O
cleavage:O
of:O
the:O
acid:O
side-chain:O
,:O
decarboxylation:O
,:O
and:O
ring:O
opening:O
.:O