People are watching a man balance a silver ball on his arms.
A person is holding a silver object.
Watching a man balance a ball on his arms is a more detailed way to say a person is holding a silver object.
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 e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_object(x2) & of(x2,x3) & n_silver(x3) & n_person(x1))