Two females, one wearing a yellow dress, the other wearing a white top and black shorts posing for a picture.
The females are sisters.
Just because females are posing for a picture it does not mean they are sisters.
exists e1 e3 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(n_other(x4) & for(e3,x7) & n_picture(x7) & Actor(e3,x6) & v_pose(e3) & n_shorts(x6) & a_black(s3) & Theme(s3,x6) & Theme(e2,x5) & Actor(e2,x4) & v_wear(e2) & n_top(x5) & a_white(s2) & Theme(s2,x5) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_dress(x3) & a_yellow(s1) & Theme(s1,x3) & rel(x1,x2) & n_thing(x2) & card_eq_1(x2) & n_female(x1) & card_eq_2(x1))
exists p1 x1.(n_female(x1) & exists x2.((x1 = x2) & n_sister(x2)))