An elderly woman is making pancakes.
A young woman is preparing dinner.
Elderly means old, the opposite of young. She can't be both.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_pancake(x2) & n_woman(x1) & a_elderly(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_prepare(e1) & n_dinner(x2) & n_woman(x1) & a_young(s1) & Theme(s1,x1))