Question: In "A Short Drink from a Certain Fountain," the experimental youth serum alludes to what famous spring?
Sentence (from "Fountain of Youth"): Tales of such a fountain have been recounted across the world for thousands of years, appearing in writings by Herodotus (5th century BC), the Alexander romance (3rd century AD), and the stories of Prester John (early Crusades, 11th/12th centuries AD).
Relevant evidence: No