A woman and boy sit on a police motorcycle.
A mother and son pose for the camera on a police motorcycle.
People don't have to pose for the camera just because they are sitting on a police motorcycle.
exists e1 x1 x2 x3 x4 x5.(on(e1,x4) & n_motorcycle(x4) & of(x4,x5) & n_police(x5) & Actor(e1,x1) & v_sit(e1) & n_boy(x3) & n_woman(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 x1 x2 x3 x4 x5 x6.(n_camera(x4) & for(e1,x4) & on(x4,x5) & n_motorcycle(x5) & of(x5,x6) & n_police(x6) & Actor(e1,x1) & v_pose(e1) & n_son(x3) & n_mother(x2) & subset_of(x3,x1) & subset_of(x2,x1))