A red-haired child is eating something.
A child is drinking soda.
One would be drinking liquids while one would be eating solids. One can't do both simultaneously.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_thing(x2) & n_child(x1) & a_red-haired(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_soda(x2) & n_child(x1))