Several mischievous kids play with toy guns in a public area.
Several young boys are pretending to play cops and robbers
Not all kids are boys.  Playing with toy guns does not imply it is cops and robbers.
exists e1 s1 s2 s3 x1 x2 x3 x4.(with(e1,x2) & in(x2,x4) & n_area(x4) & a_public(s3) & Theme(s3,x4) & n_gun(x2) & of(x2,x3) & n_toy(x3) & Actor(e1,x1) & v_play(e1) & n_kid(x1) & a_mischievous(s2) & Theme(s2,x1) & a_several(s1) & Theme(s1,x1))
exists e1 p1 s1 s2 x1.(Topic(e1,p1) & Actor(e1,x1) & v_pretend(e1) & exists e2 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & subset_of(x4,x2) & n_robber(x4) & subset_of(x3,x2) & n_cop(x3)) & n_boy(x1) & a_young(s2) & Theme(s2,x1) & a_several(s1) & Theme(s1,x1))