Complex sentence: Sanjay Singh was born on 25 September 1951 in the city of Amethi, which was at that time in Sultanpur district he was adopted by the raja saheb of amethi.
Split into simpler sentences: Sanjay Singh was born on 25 September 1951 in the city of Amethi, which was at that time in Sultanpur district. He was adopted by the raja saheb of amethi.