Question:
Who was the head of Brno in Apr, 2019?

Context:
 Petr Vokřál is the head of the government of Brno from Nov, 2014 to Nov, 2018. 
 Roman Onderka is the head of the government of Brno from Nov, 2006 to Nov, 2014. 
 Markéta Vaňková is the head of the government of Brno from Nov, 2018 to Dec, 2022.

Answer:
Markéta Vaňková