a young skier and his mother enjoying a day on the slopes and posing for a picture.
A mother and son are on the ski slopes.
We don't know that the people are on the ski slopes.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7.(n_slope(x5) & a_topic(s1) & subset_of(x2,s1) & for(e2,x7) & n_picture(x7) & Actor(e2,x6) & v_pose(e2) & (x2 = x6) & Theme(e1,x4) & Actor(e1,x3) & v_enjoy(e1) & on(x4,x5) & n_day(x4) & (x2 = x3) & n_mother(x2) & of(x2,x1) & n_male(x1) & subset_of(x1,s1) & n_skier(x1) & a_young(s2) & Theme(s2,x1))
exists p1 x1 x2 x3 x4 x5.(n_slope(x4) & of(x4,x5) & n_ski(x5) & on(x1,x4) & n_son(x3) & n_mother(x2) & subset_of(x3,x1) & subset_of(x2,x1))