Two MMA fighters spar in a ring.
There is a fight between two people.
MMA fighters fight; it takes two people to spar.
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x4) & n_ring(x4) & n_spar(x1) & of(x1,x3) & n_fighter(x3) & (x1 = x2) & ne_org_mma(x2) & card_eq_2(x1))
exists p1 x1 x2 x3.((x1 = x2) & between(x2,x3) & n_people(x3) & card_eq_2(x3) & n_fight(x2))