Question: What is the commonly known name of a German football player who provided the inspiration for a nickname of Flávio Sérgio Viana?
Sentence (from "Mário Sérgio Pontes de Paiva"): Mário Sérgio Pontes de Paiva, more commonly known as Mário Sérgio (7 September 1950 – 28 November 2016), was a Brazilian footballer and manager, who later became a commentator for Fox Sports Brazil, which he joined at the channel's inception in 2012.
Relevant evidence: No