The man is skateboarding.
A man is skateboarding in a parking lot.
A parking lot is not the only place where one can go skateboarding.
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_skateboard(e1))
exists e1 x1 x2 x3.(in(e1,x2) & n_lot(x2) & of(x2,x3) & n_parking(x3) & Actor(e1,x1) & v_skateboard(e1) & n_man(x1))