A male gymnast is swinging on the rings.
There was a man swinging from the gymnastic rings.
The man is on gymanstic rings which implies that he is a gymnast.
exists e1 s1 x1 x2.(n_ring(x2) & on(e1,x2) & Actor(e1,x1) & v_swing(e1) & n_gymnast(x1) & a_male(s1) & Theme(s1,x1))
exists p1 s1 x1 x4.(n_ring(x4) & a_gymnastic(s1) & Theme(s1,x4) & exists e1 x2 x3.((x1 = x2) & from(e1,x4) & Actor(e1,x3) & v_swing(e1) & (x2 = x3) & n_man(x2)))