A plating company that dumped thousands of gallons of cyanide-laced waste water into the Los Angeles sewer system pleaded guilty.
The water in the Los Angeles sewer system is contaminated.
It is definitely correct because the cyanide-laced waste definitely mixed with the rest of the sewage system in LA, and so the water is now contaminated. I think it fooled the system because the system cannot tell whether the cyanide-waste is a contaminate or not.
( z1 contaminate :ARG1 ( z2 water :location ( z3 system :mod ( z4 sewer ) :mod ( z5 city :name ( z6 name :op "Los" :op "Angeles" ) ) ) ) )