A man barbecues chicken on a grill.
A woman frying a chicken.
It would have to be either a man or a woman. The chicken is either being grilled or fried.
exists e1 x1 x2 x3.(on(e1,x3) & n_grill(x3) & Theme(e1,x2) & Actor(e1,x1) & v_barbecue(e1) & n_chicken(x2) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_fry(e1) & n_chicken(x3) & (x1 = x2) & n_woman(x1))