Grandmother and her granddaughter opening presents at Christmas time.
The presents are expensive
Present have many values and not all of them are expensive
exists e1 s1 x1 x2 x3 x4 x5 x6.(ne_nam_grandmother(x1) & a_topic(s1) & subset_of(x3,s1) & at(e1,x5) & n_time(x5) & (x5 = x6) & ne_tim_christmas(x6) & Theme(e1,x2) & Actor(e1,x4) & v_open(e1) & n_present(x2) & (x3 = x4) & n_granddaughter(x3) & of(x3,x2) & n_female(x2) & subset_of(x1,s1))
exists s1 x1.(n_present(x1) & Theme(s1,x1) & a_expensive(s1))