People are watching a man balance a silver ball on his arms.
A group of people are watching a man balance a silver object using the top of his head.
A man can be balancing a silver object either on his arms or using the top of his head.
exists x1 x5.(all x2 s1.((n_ball(x2) & a_silver(s1) & Theme(s1,x2)) -> exists e1 x3 x4.(on(e1,x5) & Theme(e1,x3) & Actor(e1,x1) & v_watch(e1) & for(x3,x2) & n_balance(x3) & of(x3,x4) & n_man(x4))) & n_arm(x5) & of(x5,x1) & n_male(x1) & n_people(x1))
exists x1 x2 x6 x7.(n_head(x7) & of(x7,x6) & n_male(x6) & n_top(x6) & all x3 s1.((n_object(x3) & a_silver(s1) & Theme(s1,x3)) -> exists e2 e1 x4 x5.(for(e1,e2) & Theme(e2,x6) & Actor(e2,x1) & v_use(e2) & of(x6,x7) & Theme(e1,x4) & Actor(e1,x1) & v_watch(e1) & for(x4,x3) & n_balance(x4) & of(x4,x5) & n_man(x5))) & of(x1,x2) & n_people(x2) & n_group(x1))