Question: When is the founder of Arena (Swimwear) 's birthday?
Sentence (from "Horst Dassler"): Horst Dassler (12 March 1936 – 9 April 1987) was the son of Adolf "Adi" Dassler, known as the "shoemaker of the nation," as a result of the extensive sales of Adidas brand sports shoes by the company he founded (until 1948 known as Gebrüder Dassler) in 1924.
Relevant evidence: Yes