A group of teenagers are sitting together on the grass.
The teenagers are running around.
The teenagers are either sitting or running.
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 p1 x1.(n_teenager(x1) & exists s1.(Theme(s1,x1) & a_around(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_run(e1))