Muay thai fighters competing in a ring.
Fighters are in a competition.
Only during a competition do fighters be in the ring.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x5) & n_ring(x5) & Actor(e1,x4) & v_compete(e1) & (x1 = x4) & n_fighter(x1) & (x1 = x3) & ne_nam_thai(x3) & (x1 = x2) & ne_per_muay(x2))
exists p1 x1.(exists x2.(in(x1,x2) & n_competition(x2)) & n_fighter(x1))