A brunette contortionist practices with other contortionists on a blue mat.
A contortionist is preparing for a performance.
The contortionist may just practice their skills and not necessarily for a performance.
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & with(x1,x3) & on(x3,x4) & n_mat(x4) & a_blue(s2) & Theme(s2,x4) & -(x3 = x2) & n_contortionist(x2) & n_contortionist(x2) & n_contortionist(x3) & n_practice(x1) & of(x1,x2) & a_brunette(s1) & Theme(s1,x1))
exists e1 x1 x2.(for(e1,x2) & n_performance(x2) & Actor(e1,x1) & v_prepare(e1) & n_contortionist(x1))