Two woman in brown coats in the background of a woman walking toward the front of the picture.
The women are sisters.
Just because there are two women  does not necessarily mean the women are sisters.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_picture(x7) & n_front(x6) & n_background(x3) & a_topic(x1) & in(x1,x3) & of(x3,x4) & toward(e1,x6) & of(x6,x7) & Actor(e1,x5) & v_walk(e1) & (x4 = x5) & n_woman(x4) & in(x1,x2) & n_coat(x2) & a_brown(s1) & Theme(s1,x2) & n_woman(x1) & card_eq_2(x1))
exists p1 x1.(n_woman(x1) & exists x2.((x1 = x2) & n_sister(x2)))