The old men are sitting on a bench.
The sad men are sitting on a bench.
old men doesn't always mean sad
exists e1 s1 x1 x2.(n_man(x1) & a_old(s1) & Theme(s1,x1) & on(e1,x2) & n_bench(x2) & Actor(e1,x1) & v_sit(e1))
exists e1 s1 x1 x2.(n_man(x1) & a_sad(s1) & Theme(s1,x1) & on(e1,x2) & n_bench(x2) & Actor(e1,x1) & v_sit(e1))