Question: The stream which the city named after the daughter of a Greek fabulist and story teller is a tributary of which river?

 It was a prehistoric city built next to the banks of the stream Harpinates, a tributary of the Alfeios.  It was part of the city state of Pisatis and at the time of Pausanias it was ruined.  Its name came from a nymph Harpina daughter of Aesop and, with Ares, mother of Oenomaus who was the founder of the city. Harpina (Ancient Greek: Ἆρπινα ) was an ancient city in Elis, Greece. <SEP> The Anyangcheon is a river in Gyeonggi-do and Seoul, South Korea.  It has its source on the slopes of Mount Gwanggyo in the city of Uiwang and flows north, through the city of Gunpo, where a major cleanup operation saw several species of birds return to the area in 2005.  Here, though, the water table remains depleted.  The river then flows through Anyang City, where it is met by its major tributary, the Hakuicheon stream.  From here, it loops around to the west before continuing north to the border with Gwangmyeong City.  As the river passes to the west of Mount Gwanak, it forms the border between Gwangmyeong and Seoul, where it is lined on the Gwangmyeong side with rape fields and cherry blossom trees.  After the stream is joined near Guil Station from the west by the Mokgamcheon stream, which forms another border between Gwangmyeong and Seoul, it is then totally within the capital.  Here, it is also joined from the east by the Dorimcheon and passes through a conservation zone for migratory birds which was established after a 2005 cleanup operation, whereafter it joins the Han.  Most of the length of the river has a path alongside providing easy access, the only parts without this lying in Uiwang.  Seoul City Council has embarked on a programme of exclusive cycle path creation alongside its waterways, including the Anyangcheon, to be completed in 2010. <SEP>  Although his existence remains unclear and no writings by him survive, numerous tales credited to him were gathered across the centuries and in many languages in a storytelling tradition that continues to this day. Aesop ( ; Ancient Greek: Αἴσωπος , "Aisōpos "; c. 620 – 564 BCE) was a Greek fabulist and story teller credited with a number of fables now collectively known as "Aesop's Fables".  Many of the tales are characterized by animals and inanimate objects that speak, solve problems, and generally have human characteristics. <SEP> The Lei River () is a right-bank tributary of the middle Xiang River in Hunan, China.  It is also the longest tributary and has the second largest drainage system of the Xiang tributaries after the Xiao River.  The Lei River has two sources: the "Zhejiang River" (), which rises in the "Leishan Moutains" () in the south of Rucheng County, and the "Ou River" (), which rises in the Wanyang Mountains () in the north of Guidong County.  The two rivers join at Huangcaoping (), Zixing City.  The main stream of the Lei River runs generally south to northwest through Rucheng, Zixing, Suxian, Yongxing, Leiyang, Hengnan and Zhuhui counties and joins the Xiang at Leihekou () of Zhuhui District of Hengyang.  The main stream of the Lei River has a length of 453 km , with its tributaries, and the drainage basin covers an area of 11,783 km2 .