A little boy does a cartwheel on the beach.
A little boy is doing gymnastics at the beach
Just because the boy does a cartwheel does not mean he is doing gymnastics.
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 x3.(n_beach(x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_gymnastics(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))