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

Context paragraphs:
Stafford Meadow Brook: Stafford Meadow Brook (also known as Stafford Meadow Creek) is a tributary of the Lackawanna River in Lackawanna County, Pennsylvania, in the United States.  It is approximately 11.2 mi long and flows through Roaring Brook Township, Scranton, and Moosic.  The watershed of the stream has an area of 14.1 sqmi .  Part of it is designated as a High-Quality Coldwater Fishery and a Migratory Fishery.  The other part is a Warmwater Fishery and a Migratory Fishery.  The stream has one named tributary, which is known as Mountain Lake Run.  Stafford Meadow Brook has a very high level of water quality for much of its length and part of it meets the criteria for an Exceptional Value designation.  The stream begins on the Pocono Plateau and flows through the Moosic Mountains in a mountainous watershed.  Its channel has been substantially altered in its lower reaches.

Aesop: 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".  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.  Many of the tales are characterized by animals and inanimate objects that speak, solve problems, and generally have human characteristics.

Braamfontein Spruit: The Braamfontein Spruit (from the Afrikaans for "spring of brambles") is the longest stream in Johannesburg, South Africa.  It originates in Barnato Park High School, Braamfontein.  It is covered and canalised near its source, but once the river runs out of the Parkview Golf Course, it runs through parkland, right to the edge of the city, so that Johannesburgers can still enjoy it in its original state.  Walkers, runners and cyclists use a path along its banks every weekend in Gauteng, South Africa.  From Berea the stream runs through Pieter Roos Park, down Empire Road to the Frank Brown Park, then on towards the German School in Auckland Park .  The stream then flows towards the Parkview Golf Course, where sections of it are canalised.  It exits the golf course and runs through Parkhurst, where it meets the second small tributary, the Westdene Spruit.  The stream then flows through River Club, Bryanston, Rivonia and Sunninghill.  Its largest tributary, the Sand Spruit, joins the stream in Sunninghill before it joins the Jukskei River in Leeuwkop Prison.

Anyangcheon: 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.

Frankford Creek: Frankford Creek is a minor tributary of the Delaware River in southeast Pennsylvania.  It derived its name from the nearby town of Frankford, Philadelphia County.  The stream originates as Tookany Creek at Hill Crest in Cheltenham Township and meanders eastward, then southeastward, throughout Cheltenham Township, until a sharp bend near the Philadelphia border at Lawncrest, where the place names Toxony and Tookany were used in historic times; the stream is still known as Tookany Creek in this region, where it flows southwest.  Turning south into Philadelphia at the crotch of Philadelphia's Y-shaped border, the creek is called Tacony Creek; from here southward, it is considered the informal boundary separating Northeast Philadelphia from the rest of the city.  The Philadelphia neighborhoods of Olney and Feltonville lie on the western side of the stream in this area while Northwood, Lawncrest, Summerdale, and Frankford lie on the eastern side.  It continues to be called the Tacony at least until the smaller Wingohocking Creek merges with it in Juniata Park, within the city-owned golf course.  Beyond Castor Avenue it is known as Frankford Creek until the stream's confluence with the Delaware River in the Bridesburg neighborhood of Philadelphia, Pennsylvania.  The section of stream known as Frankford Creek is 3.1 mi long, and the upstream section known as Tacony Creek, from Hill Crest, is 11.1 mi long.

Cedar Creek (Missouri River): Cedar Creek is a stream in Boone and Callaway counties of the U.S. state of Missouri.  It is a tributary of the Missouri River.  The headwaters of Cedar Creek are in northeast Boone County about five miles east of Hallsville and one mile west of the Audrain-Boone county line.  The stream flows south and about five miles south of its headwaters the stream becomes the boundary between Boone and Callaway counties.  The stream crosses under Interstate 70 about eight miles east of Columbia and enters the Mark Twain National Forest.  The stream flows south to southwest through the national forest and upon leaving the forest turns to the east and ceases to be the county line.  The stream flows east for about one mile then turns south and flows under U. S. Route 63 and into the Missouri River four miles northwest of Cedar City and across the river from Jefferson City.  The Katy Trail crosses Cedar Creek just north of its confluence with the Missouri.

Lei River: 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 .

Harpina (city): Harpina (Ancient Greek: Ἆρπινα ) was an ancient city in Elis, Greece.  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.

Walloomsac River: The Walloomsac River ( or ) from the Native American name, Wal-loom-sac is a 16.8 mi tributary of the Hoosic River in the northeastern United States.  It rises in southwestern Vermont, in the Green Mountains east of the town of Bennington in Woodford Hollow at the confluence of Bolles Brook and City Stream where it is labeled Walloomsac Brook on maps but is locally known as "The Roaring Branch".  The river then flows west toward Bennington and passes the downtown area to the north.  For many years this section was intermittent due to the water having been diverted to power mills in town (ca. 1810).  This divergence gave the name Walloomsac to a portion of the river flowing through town on the present course of South Stream.  The combined Walloomsac / South Stream joins the Roaring Branch northwest of town.  From here the river flows westward as the Walloomsac River and joins the Hoosic River below Hoosick Falls, New York.

Crooked River (Missouri): The Crooked River is a 71.4 mi tributary of the Missouri River in west-central Missouri in the United States.  The river was the site of the Battle of Crooked River during the Mormon War of 1838.  According to the Geographic Names Information System, the stream has also been known historically as "Big Creek," "Little River" and "Tiger River."  The Crooked River was named for its meandering disposition.  Big Creek refers to the stream's status as the largest tributary to the Missouri River in the county.

Supporting paragraphs: Harpina (city) Aesop
Answer: Alfeios