Young people pose for their picture in the countryside.
Young people are taking selfies.
Just because it is young people taking pictures, they aren't necessarily selfies.
exists e1 s1 x1 x2 x3.(n_countryside(x3) & for(e1,x2) & in(x2,x3) & n_picture(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_pose(e1) & n_people(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_selfy(x2) & n_people(x1) & a_young(s1) & Theme(s1,x1))