More than 6,400 migratory birds and other animals were killed in Nevada by drinking water in the cyanide-laced ponds produced by gold mining operations.
The poisoned water came from human activities leading to many dead
( z1 come :ARG1 ( z2 water :ARG1-of ( z3 poison ) ) :ARG2 ( z4 activity :ARG0 ( z5 human ) :ARG0-of ( z6 lead :ARG2 ( z7 die :ARG1 ( z8 person :quant ( z9 many ) ) ) ) ) )