Two children play soccer on green grass.
The children are having fun.
The children playing soccer in the grass are not necessarily having fun.
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_grass(x3) & a_green(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_soccer(x2) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_child(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_fun(x2))