A woman is bowling in a bowling alley.
A man is bowling
it is either a man or a woman who is bowling
exists e1 x1 x2 x3.(in(e1,x2) & n_alley(x2) & of(x2,x3) & n_bowling(x3) & Actor(e1,x1) & v_bowl(e1) & n_woman(x1))
exists e1 x1.(Actor(e1,x1) & v_bowl(e1) & n_man(x1))