Answer the questions based on the information given below. There are eight family members L, M, N, O, P, Q, R and S having two married couples and two grandchildren. Q, who is unmarried, is the uncle of P, who is daughter of N. S has one daughter and one son. M is granddaughter of L and sister of O. L is sister-in-law of Q. S is not a male. P has only one brother. How is O related to P?