A boy in black clothes is doing a cartwheel on the beach.
A boy is having fun at the beach.
Doing a cartwheel does not necessarily mean having fun.
exists e1 s1 x1 x2 x3 x4.(n_beach(x4) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & on(x3,x4) & n_cartwheel(x3) & in(x1,x2) & n_clothes(x2) & a_black(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2 x3.(n_beach(x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_fun(x2) & n_boy(x1))