A man plays with a little boy, holding him upside down.
the man is his father
The man that plays with a little boy doesn't have to be his father, it may be another male relative.
exists e2 e1 p1 s1 x1 x2.(for(e1,e2) & exists s2.(r_upside(s2) & Theme(s2,x2) & a_down(s2)) & Recipient(e2,p1) & Actor(e2,x1) & Topic(e2,x2) & v_hold(e2) & n_male(x2) & with(e1,x2) & n_boy(x2) & a_little(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))
exists p1 x1 x2.(n_father(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & (x1 = x2))