A boy smiles for the camera in a group of sitting children.
A class gets their picture taken.
A group of sitting children is not necessarily a class.
exists e2 e1 x1 x2 x3 x4.(n_camera(x2) & for(e1,x2) & in(x2,x3) & of(x3,x4) & n_child(x4) & Actor(e2,x4) & v_sit(e2) & n_group(x3) & Actor(e1,x1) & v_smile(e1) & n_boy(x1))
exists e2 e1 x1 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_get(e2) & Theme(e1,x3) & v_take(e1) & (x2 = x3) & n_picture(x2) & of(x2,x1) & n_thing(x1) & n_class(x1))