The gang watches some TV.
The gang is playing poker.
The gang cannot be watching TV and playing poker at the same time.
exists e1 x1 x2.(n_gang(x1) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_tv(x2))
exists e1 x1 x2.(n_gang(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_poker(x2))