A man plays tennis.
The woman plays tennis.
A man and a woman are two different persons
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_tennis(x2) & n_man(x1))
exists e1 x1 x2.(n_woman(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_tennis(x2))