A person falls into the mud while being trampled by a bull.
A person is mud wrestling with a bull.
A person being trampled by a bull is not the same thing as a person mud wrestling with a bull
exists e2 e1 x1 x2 x3.(n_mud(x2) & while(e1,e2) & Actor(e2,x3) & n_bull(x3) & Theme(e2,x1) & v_trample(e2) & into(e1,x2) & Actor(e1,x1) & v_fall(e1) & n_person(x1))
exists p1 x1.(exists s1 x2 x3.((x1 = x2) & with(x2,x3) & n_bull(x3) & n_wrestling(x2) & a_mud(s1) & Theme(s1,x2)) & n_person(x1))