Yound people make goofy faces for the camera.
Some people are acting silly
The fact that the people are making goofy faces indicates that they are acting silly.
exists e1 s1 s2 x1 x2 x3.(n_camera(x3) & Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & for(x2,x3) & n_face(x2) & a_goofy(s2) & Theme(s2,x2) & n_people(x1) & a_yound(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_act(e1) & n_silly(x2) & n_people(x1))