A man is hiking with the help of a walking stick.
A man is swimming with his walking stick
One cannot be hiking and swimming at the same time.
exists e1 x1 x2 x3 x4.(n_help(x2) & with(e1,x2) & of(x2,x3) & n_stick(x3) & of(x3,x4) & n_walking(x4) & Actor(e1,x1) & v_hike(e1) & n_man(x1))
exists e1 x1 x2 x3.(with(e1,x2) & n_stick(x2) & of(x2,x3) & n_walking(x3) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_swim(e1) & n_man(x1))