Question 1
If:
A = brother of, B = sister of, C = father of, D = mother of, E = son of, F = daughter of, G = husband of, H = wife of
Then what does 'Paul G Kofi and Kofi C Charu' mean in terms of Paul's relation to Charu?
G = 'husband of', C = 'father of'. Combining: Paul is husband of Kofi, and Kofi is father of Charu. Therefore, Paul is father-in-law of Charu.