In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.

Input: Consider Input: In pre-Roman Gaul the Belgic tribe of the Veliocasses or Velocasses controlled a large area in the lower Seine valley, which retains a trace of their name, as the Vexin. According to Julius Caesar' "Commentary on the Gallic Wars" the Veliocasses participated in the tribal coalition of the Belgae that resisted the Romans in 57 BCE. In 52 they raised 3000 men to support Vercingetorix, and fought alongside the Bellovaci in the final rebellion against Roman hegemony. Question: In pre-Roman Gaul the Belgic tribe of the Veliocasses or Velocasses controlled a large area in the lower Seine valley, which retains a trace of their name, as the Vexin, in 52 they raised 3000 men to support which son of Celtillus the Avernian, leader of the Gallic tribes? Answer: Vercingetorix

Output:  In 52 they raised 3000 men to support Vercingetorix, and fought alongside the Bellovaci in the final rebellion against Roman hegemony.


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

Output: 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 Aesops Fables.


Input: Consider Input: The Rotor is an amusement park ride, designed by German engineer Ernst Hoffmeister in the late 1940s. The ride was first demonstrated at Oktoberfest 1949, and was exhibited at fairs and events throughout Europe during the 1950s and 1960s. The ride still appears in numerous amusement parks, although travelling variants have been surpassed by the Gravitron. Question: The Rotor is an amusement park ride that first demonstrated during a festival held in what city? Answer: Munich


Output:  The ride was first demonstrated at Oktoberfest 1949, and was exhibited at fairs and events throughout Europe during the 1950s and 1960s.