A plating company that dumped thousands of gallons of cyanide-laced waste water into the Los Angeles sewer system pleaded guilty.
The company had no idea they were dumping waste into the sewer
( z1 know :polarity - :ARG0 ( z2 company ) :ARG1 ( z3 dump :ARG0 z2 :ARG1 ( z4 waste ) :ARG2 ( z5 sewer ) ) )