A man leans against a green column in the subway.
A man is racing to catch the subway.
If you're racing you cannot possibly be leaning against a column.
exists e1 s1 x1 x2 x3.(n_subway(x3) & against(e1,x2) & in(x2,x3) & n_column(x2) & a_green(s1) & Theme(s1,x2) & Actor(e1,x1) & v_lean(e1) & n_man(x1))
exists e1 p1 x1 x2.(n_subway(x2) & Topic(e1,p1) & Actor(e1,x1) & v_race(e1) & exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_catch(e2)) & n_man(x1))