A man wearing dirty clothes is sleeping on the sidewalk.
a hobo sleeps outside
Wearing dirty clothes doesnt necessary mean that he is a hobo. Sleeping outside can be anywhere,  it doesn't have to be on the side walk.
exists e2 e1 s1 x1 x2 x3 x4.(n_sidewalk(x4) & on(e2,x4) & Actor(e2,x1) & v_sleep(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_clothes(x3) & a_dirty(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_outside(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_sleep(e1) & n_hobo(x1))