A little boy does a cartwheel on the beach.
A little boy is playing at the beach.
Playing at the beach was a little boy doing a cartwheel.
exists e1 s1 x1 x2 x3.(n_beach(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_cartwheel(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(n_beach(x2) & at(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_little(s1) & Theme(s1,x1))