'D + E' means 'D is the father of E' 'D - E' means 'D is the sister of E' 'D × E' means 'D is the mother of E' 'D ÷ E' means 'D is the brother of E'. Which of the following expressions represents 'K is the brother's daughter of L'?

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?