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 ":".
They
participate
in
several
metabolic
pathways
:
1,2-dichloroethane
degradation
,
1-chloro-n-butane
degradation
,
hexachlorocyclohexane
degradation
,
1,2-dibromoethane
degradation
,
2-chloroethyl-vinylether
degradation
,
and
1,3-dichloropropene
degradation
.
They:O
participate:O
in:O
several:O
metabolic:O
pathways:O
::O
1,2-dichloroethane:other-chemicalthing
degradation:other-chemicalthing
,:O
1-chloro-n-butane:other-chemicalthing
degradation:other-chemicalthing
,:O
hexachlorocyclohexane:other-chemicalthing
degradation:other-chemicalthing
,:O
1,2-dibromoethane:other-chemicalthing
degradation:other-chemicalthing
,:O
2-chloroethyl-vinylether:other-chemicalthing
degradation:other-chemicalthing
,:O
and:O
1,3-dichloropropene:other-chemicalthing
degradation:other-chemicalthing
.:O