Rocks.<br>A bunch of waves went over the cliffs. The weathering started to take a toll. Some rocks began to fall. They made a splash in the waves. The rocks fell to the bottom of the ocean.
A group of seals caused the rocks to fall to the bottom of the ocean.
I fooled the system by changing what caused the rocks to fall.
( z1 cause :ARG0 ( z2 group :cxnsistof ( z3 seal ) ) :ARG1 ( z4 fall :ARG1 ( z5 rock ) :ARG4 ( z6 bottom :part-of ( z7 ocean ) ) ) )