The person is doing a handstand on the beach.
A person is thinking about summer fun.
Doing a handstand does not necessarily mean thinking about summer fun.
exists e1 x1 x2 x3.(n_beach(x3) & n_person(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & on(x2,x3) & n_handstand(x2))
exists e1 x1 x2 x3.(about(e1,x2) & n_fun(x2) & of(x2,x3) & n_summer(x3) & Actor(e1,x1) & v_think(e1) & n_person(x1))