A group of men play hockey in a stadium.
A woman's volleyball team is playing a match.
They can  play hockey or volleyball and not both
exists e1 x1 x2 x3 x4.(in(e1,x4) & n_stadium(x4) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_hockey(x3) & of(x1,x2) & n_man(x2) & n_group(x1))
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x2) & v_play(e1) & n_match(x4) & n_team(x2) & of(x2,x3) & n_volleyball(x3) & of(x2,x1) & n_woman(x1))