A man lifting a little boy out of the water.
A man lifts his young son out of the pool.
Just because a man lifts a little boy does not mean it is his son. Water does not imply pool.
exists e1 s1 x1 x2 x3 x4.(n_water(x4) & a_topic(x1) & of(e1,x4) & r_out(e1) & Theme(e1,x3) & Actor(e1,x2) & v_lift(e1) & n_boy(x3) & a_little(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_pool(x3) & of(e1,x3) & r_out(e1) & Theme(e1,x2) & Actor(e1,x1) & v_lift(e1) & n_son(x2) & a_young(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & n_man(x1))