sentences:  In his book "Dream Pool Essays" written in 1088, the scientist and statesman Shen Kuo of the Song Dynasty coined the word 石油 ("Shíyóu", literally "rock oil") for petroleum, which remains the term used in contemporary Chinese and Japanese ("Sekiyū").The first streets of Baghdad were paved with tar, derived from petroleum that became accessible from natural fields in the region.In the 9th century, oil fields were exploited in the area around modern Baku, Azerbaijan.