A group of young boys making silly faces.
A group of friends are being silly outdoors
The relationship between a group of young boys may or may not be friends.  The boys could be silly indoors or outdoors.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_make(e1) & n_face(x4) & a_silly(s2) & Theme(s2,x4) & (x1 = x3) & of(x1,x2) & n_boy(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))
exists p1 x1 x2.(exists s1 x3.((x1 = x3) & n_outdoors(x3) & a_silly(s1) & Theme(s1,x3)) & of(x1,x2) & n_friend(x2) & n_group(x1))