An average man washes the windows of a building.
A man is washing windows on the whitehouse
You can not infer it is the whitehouse.
exists e1 s1 x1 x2 x3.(n_window(x2) & Theme(e1,x2) & Actor(e1,x1) & v_wash(e1) & of(x2,x3) & n_building(x3) & n_man(x1) & a_average(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_whitehouse(x3) & Theme(e1,x2) & Actor(e1,x1) & v_wash(e1) & on(x2,x3) & n_window(x2) & n_man(x1))