The dog is carrying a toy through the grass.
A cat is catching a mouse.
It can either be a dog or a cat.
exists e1 x1 x2 x3.(n_grass(x3) & n_dog(x1) & through(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & n_toy(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & n_mouse(x2) & n_cat(x1))