Read the following data carefully and answer the question based on it.

i) ‘A + B’ means ‘A is the son of B’

ii) ‘A % B’ means ‘A is the wife of B’

iii) ‘A x B’ means ‘A is the brother of B’

iv) ‘A - B’ means ‘A is the father of B’

If P + Q % R x S - T, then how is P related to S?