Answer the questions based on the information given below. There are 8 members H, I, J, K, L, M, N and O in a family. No single person in the family is a parent. There are only three married couples. I is nephew of J, who is married to H. L is daughter-in-law of N. M is paternal aunt of K. J is brother-in-law of N. H has only two sons. How many persons are there in the first generation?