Two children without shirts on sit at the edge of a fountain.
Two children are sitting on a foutain.
Children that sit at the edge of a fountain are definitely sitting on a fountain.
exists e1 x1 x2 x3.(n_edge(x2) & at(e1,x2) & of(x2,x3) & n_fountain(x3) & Actor(e1,x1) & v_sit(e1) & -exists s1 x4 x5.(with(x1,x4) & Theme(s1,x5) & a_on(s1) & (x4 = x5) & n_shirt(x4)) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_foutain(x2) & Actor(e1,x1) & v_sit(e1) & n_child(x1) & card_eq_2(x1))