Question:
Who was the head coach of the team Olympique Lyonnais in Sep, 2019?

Context:
 Peter Bosz is the head coach of Olympique Lyonnais from May, 2021 to Oct, 2022. 
 Laurent Blanc is the head coach of Olympique Lyonnais from Oct, 2022 to Dec, 2022. 
 Bruno Génésio is the head coach of Olympique Lyonnais from Dec, 2015 to May, 2019. 
 Rudi Garcia is the head coach of Olympique Lyonnais from Oct, 2019 to May, 2021. 
 Sylvinho is the head coach of Olympique Lyonnais from May, 2019 to Oct, 2019.

Answer:
Sylvinho