two fighters kickboxing
The fighters are kickboxing in a ring.
It is possible to kickbox outside of a ring.
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_kickbox(e1) & (x1 = x2) & n_fighter(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_fighter(x1) & in(e1,x2) & n_ring(x2) & Actor(e1,x1) & v_kickbox(e1))