Question: Who is a Greek fabulist and story teller credited with a number of fables now collectively known as "Aesop's Fables" that has a widely used index of  the storyteller who lived in ancient Greece between 620 and 560 BC?
Sentence (from "Perry Index"): The Perry Index is a widely used index of "Aesop's Fables" or "Aesopica", the fables credited to Aesop, the storyteller who lived in ancient Greece between 620 and 560 BC.
Relevant evidence: Yes