Japanese girls in plastic and karate suits to lose weight and there practicing with nun chucks.
They are in a competetion
Not all people are Japanese girls.  Not all practices are a competetion.
exists e1 p1 s1 s2 x1 x2 x3 x4 x5.(with(e1,x5) & n_chuck(x5) & a_nun(s2) & Theme(s2,x5) & Actor(e1,x1) & v_practice(e1) & in(x1,x2) & Topic(x2,p1) & exists e2 x6 x7 x8.(Theme(e2,x6) & Actor(e2,x2) & v_lose(e2) & n_there(x8) & n_weight(x7) & subset_of(x8,x6) & subset_of(x7,x6)) & n_suit(x2) & of(x2,x4) & n_karate(x4) & of(x2,x3) & n_plastic(x3) & n_girl(x1) & a_japanese(s1) & Theme(s1,x1))
exists p1 x1.(n_thing(x1) & exists x2.(in(x1,x2) & n_competetion(x2)))