A man stands in a run-down looking area.
There is a man standing.
Sentence 1 describes a man standing in a certain area, while sentence two only focuses on the fact that the man is standing.
exists e2 e1 s1 x1 x2.(in(e1,x2) & n_area(x2) & Actor(e2,x2) & v_look(e2) & a_run-down(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists p1 x1 x2 x3.((x1 = x2) & n_standing(x2) & of(x2,x3) & n_man(x3))