‘A + B’ means ‘A is the daughter of B’, ‘A = B’ means ‘A is the sister of B’,…

‘A + B’ means ‘A is the daughter of B’, ‘A = B’ means ‘A is the sister of B’, and ‘A ^ B’ means ‘A is the brother of B’. If ‘Q ^ K = M + W ^ S’, then how is W related to Q?