The dam covering what used to be its football pitch fill up with millions of tons of poisonous mining waste.
Millions of tons of mining waste are held behind the dam
( z1 hold :ARG1 ( z2 waste :source ( z3 mine ) :quant ( z4 multiple :op ( z5 mass-quantity :quant 1000000 :unit ( z6 ton ) ) ) ) :location ( z7 behind :op ( z8 dam ) ) )