A girl in a black shirt looks at the camera while eating an apple and another smiles while looking downward.
Two girls are in the photo.
A girl and another is the same as two girls.  One girl looks at the camera and the other girl smiles at the camera implies that both girls are in the photo.
exists e4 e1 e3 e2 s1 s2 x1 x2 x3 x4 x5.(n_camera(x3) & while(e3,e4) & a_downward(s2) & Manner(e4,s2) & Actor(e4,x5) & v_look(e4) & Actor(e3,x5) & v_smile(e3) & n_thing(x5) & while(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_eat(e2) & n_apple(x4) & at(e1,x3) & Actor(e1,x1) & v_look(e1) & in(x1,x2) & n_shirt(x2) & a_black(s1) & Theme(s1,x2) & n_girl(x1))
exists p1 x1 x2.(n_photo(x2) & in(x1,x2) & n_girl(x1) & card_eq_2(x1))