Male and female ballerinas perform on a blue-lit stage.
A ballet performance takes place on stage.
There is a ballet performance when ballerinas perform.
exists e1 s1 s2 s3 x1 x2.(on(e1,x2) & n_stage(x2) & a_blue-lit(s3) & Theme(s3,x2) & Actor(e1,x1) & v_perform(e1) & n_ballerina(x1) & a_female(s2) & Theme(s2,x1) & a_male(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_stage(x4) & Theme(e1,x3) & Actor(e1,x1) & v_take(e1) & n_place(x3) & n_performance(x1) & of(x1,x2) & n_ballet(x2))