A man in dark colored clothing skies over ledge, hanging in midair.
The man does not know how to ski.
A man, who does not know how to ski, would not ski over a ledge, hanging in midair.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e2,x6) & n_midair(x6) & Actor(e2,x5) & v_hang(e2) & (x1 = x5) & in(x1,x2) & over(x2,x4) & n_ledge(x4) & n_sky(x2) & of(x2,x3) & n_clothing(x3) & Theme(e1,x2) & v_color(e1) & a_dark(s1) & Theme(s1,x2) & n_man(x1))
exists x1.(n_man(x1) & -exists e1 x2.(Topic(e1,x2) & Actor(e1,x1) & v_know(e1) & n_manner(x2) & exists e2 x3.(Actor(e2,x3) & v_ski(e2))))