Two ballerinas are mirroring two other ballerinas as they perform in front of a black background.
The ballerinas are performing in front of a black background.
If two ballerinas are mirroring two other ballerinas, they are performing
exists e1 p1 x1 x2.(exists e2 s1 x3 x4.(in(e2,x3) & of(x3,x4) & n_background(x4) & a_black(s1) & Theme(s1,x4) & n_front(x3) & Actor(e2,x1) & v_perform(e2)) & n_thing(x1) & as(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_mirror(e1) & -(x2 = x1) & n_ballerina(x1) & n_ballerina(x1) & n_ballerina(x2) & card_eq_2(x2) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(n_ballerina(x1) & in(e1,x2) & of(x2,x3) & n_background(x3) & a_black(s1) & Theme(s1,x3) & n_front(x2) & Actor(e1,x1) & v_perform(e1))