Question:
Who was the chair of Democratic Convergence of Catalonia in Aug, 2019?

Context:
 Artur Mas is the chair of Democratic Convergence of Catalonia from Mar, 2012 to Jul, 2016. 
 Vicenç Mauri i Claret is the chair of Democratic Convergence of Catalonia from Apr, 2018 to Dec, 2022. 
 Jacint Borràs i Manuel is the chair of Democratic Convergence of Catalonia from Jan, 2016 to Sep, 2017. 
 Ramon Trias Fargas is the chair of Democratic Convergence of Catalonia from Jan, 1979 to Jan, 1989. 
 Jordi Pujol is the chair of Democratic Convergence of Catalonia from Jan, 1989 to Jan, 2012.

Answer:
Vicenç Mauri i Claret