A group of teenagers are sitting together on the grass.
Teenagers are gathered together outside.
group of teenagers are sitting together is same as teenagers are gathered together outside
exists e1 p1 x1 x2 x3.(n_grass(x3) & on(e1,x3) & exists s1.(Theme(s1,x1) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_teenager(x2) & n_group(x1))
exists e1 s1 s2 x1.(a_outside(s2) & Manner(e1,s2) & a_together(s1) & Manner(e1,s1) & Theme(e1,x1) & v_gather(e1) & n_teenager(x1))