Question:
Who was the head coach of the team NK Slaven Belupo in Aug, 2021?

Context:
 Vedran Purić is the head coach of NK Slaven Belupo from Nov, 2018 to Nov, 2018. 
 Zoran Zekić is the head coach of NK Slaven Belupo from Aug, 2021 to Dec, 2022. 
 Dean Klafurić is the head coach of NK Slaven Belupo from Jul, 2021 to Aug, 2021. 
 Tomislav Stipić is the head coach of NK Slaven Belupo from Oct, 2019 to Jun, 2021.

Answer:
Dean Klafurić