In a certain code language: 'A + B' means 'A is the mother of B'; 'A - B' means 'A is the father of B'; 'A $ B' means 'A is the daughter of B'; 'A % B' means 'A is the sister of B'. Based on the above, how is P related to S if P + Q - R $ S % T?

There are three married couples in a family of three generations. A is the grandson of H; G is the mother-in-law of C; D and E are brothers. B is the only nephew of E. F is the sister-in-law of D. B is the son of C. How is B related to G?

A is the brother of B, B is the daughter of C, and D is the father of A. How is C related to D?