A man in water throwing a little boy up in the air and waiting for him to come down so he can catch him.
A man is playing with his son.
Just because a man is throwing a little boy up into the air does not mean that it is his son. It could be another person's son.
exists e1 e2 p1 s1 s2 x1 x2 x3 x4 x5 x6.(n_male(x5) & n_male(x5) & n_air(x5) & a_topic(x1) & Topic(e2,p1) & Actor(e2,x6) & v_wait(e2) & exists e3 p2 s3.(exists e4 p3.(exists e5.(Theme(e5,x1) & Actor(e5,x5) & v_catch(e5)) & Topic(e4,p3) & Actor(e4,x5) & v_can(e4)) & so(e3,p2) & a_down(s3) & Manner(e3,s3) & Actor(e3,x5) & v_come(e3)) & n_male(x1) & (x1 = x6) & in(e1,x5) & a_up(s2) & Manner(e1,s2) & Theme(e1,x4) & Actor(e1,x3) & v_throw(e1) & n_boy(x4) & a_little(s1) & Theme(s1,x4) & (x1 = x3) & in(x1,x2) & n_water(x2) & n_man(x1))
exists e1 x1 x2.(with(e1,x2) & n_son(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_play(e1) & n_man(x1))