A mother and her child posing for a photo.
The mom and child are getting a picture taken.
A mom is an informal term for a mother.   A mother and her child posing for a photo is getting their picture taken.
exists e1 s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & for(e1,x4) & n_photo(x4) & Actor(e1,x3) & v_pose(e1) & (x2 = x3) & n_child(x2) & of(x2,x1) & n_female(x1) & subset_of(x1,s1) & n_mother(x1))
exists e1 e2 x1 x2 x3 x4 x5.(n_child(x3) & n_mom(x2) & subset_of(x3,x1) & subset_of(x2,x1) & Theme(e2,x4) & Actor(e2,x1) & v_get(e2) & Theme(e1,x5) & v_take(e1) & (x4 = x5) & n_picture(x4))