A person flipping upside down
A person is doing a backflip.
There are many moves a person may do while flipping upside down which are not necessarily a backflip.
exists e1 p1 x1 x2.(a_topic(x1) & exists s1.(r_upside(s1) & Theme(s1,x2) & a_down(s1)) & Topic(e1,p1) & Actor(e1,x2) & v_flip(e1) & (x1 = x2) & n_person(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_backflip(x2) & n_person(x1))