Mother and son having fun on the beach.
mother playing catch the ball with son on beach
Just because a mother and son are having fun on the beach does not mean that they are playing catch with the ball.
exists e1 s1 x1 x2 x3 x4 x5.(n_beach(x5) & ne_nam_mother(x1) & a_topic(s1) & subset_of(x2,s1) & on(e1,x5) & Theme(e1,x4) & Actor(e1,x3) & v_have(e1) & n_fun(x4) & (x2 = x3) & n_son(x2) & subset_of(x1,s1))
exists e1 x1 x2 x3 x4 x5.(n_ball(x3) & on(e1,x5) & n_beach(x5) & with(e1,x4) & n_son(x4) & Theme(e1,x3) & Actor(e1,x1) & v_catch(e1) & n_playing(x1) & of(x1,x2) & n_mother(x2))