Question: When was the South Korean actor and singer who starred in "The Legend of the Blue Sea" born? 
Sentence (from "The Legend of the Blue Sea"): Inspired by a classic Joseon legend from Korea's first collection of unofficial historical tales about a fisherman who captures and releases a mermaid, this drama tells the love story of a con-artist and a mermaid who travels across the ocean to find him.
Relevant evidence: No