A boy in a yellow shirt is walking on a beach holding a surfboard.
A boy is walking on a beach with a kite.
A surfboard and kite are two different objects.
exists e1 e2 s1 x1 x2 x3 x4.(for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_hold(e2) & n_surfboard(x4) & on(e1,x3) & n_beach(x3) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_shirt(x2) & a_yellow(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2 x3.(with(e1,x3) & n_kite(x3) & on(e1,x2) & n_beach(x2) & Actor(e1,x1) & v_walk(e1) & n_boy(x1))