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 father plays with his son in the lake at the park.
It cannot be inferred that the child is the son or that the man is a father, let alone of this child. The water the man is in can be any body of water, not necessarily a lake at a park.
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 x3 x4.(n_park(x4) & n_lake(x3) & at(e1,x4) & in(e1,x3) & with(e1,x2) & n_son(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_play(e1) & n_father(x1))