People attempting to rope cattle.
People are roping dogs.
Dogs are being roped instead of cattle.
exists e1 p1 x1 x2.(a_topic(x1) & Topic(e1,p1) & Actor(e1,x2) & v_attempt(e1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_rope(e2) & n_cattle(x3)) & (x1 = x2) & n_people(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_rope(e1) & n_dog(x2) & n_people(x1))