Question:
Who was the head coach of the team FC Zenit Saint Petersburg in Apr, 2013?

Context:
 Luciano Spalletti is the head coach of FC Zenit Saint Petersburg from Dec, 2009 to Mar, 2014. 
 Sergei Semak is the head coach of FC Zenit Saint Petersburg from May, 2018 to Dec, 2022. 
 Roberto Mancini is the head coach of FC Zenit Saint Petersburg from Jul, 2017 to May, 2018.

Answer:
Question:
Who was the head coach of the team FC Zenit Saint Petersburg in Apr, 2013?

Context:
 Luciano Spalletti is the head coach of FC Zenit Saint Petersburg from Dec, 2009 to Mar, 2014. 
 Sergei Semak is the head coach of FC Zenit Saint Petersburg from May, 2018 to Dec, 2022. 
 Roberto Mancini is the head coach of FC Zenit Saint Petersburg from Jul, 2017 to May, 2018.

Answer:
user
Luciano Spalletti
assistant
Question:
Who was the head coach of the team FC Zenit Saint Petersburg in Apr, 2013?

Context:
 Luciano Spalletti is the head coach of FC Zenit Saint Petersburg from Dec, 2009 to Mar, 2014. 
 Sergei Semak is the head coach of FC Zenit Saint Petersburg from May, 2018 to Dec, 2022. 
 Roberto Mancini is the head coach of FC Zenit Saint Petersburg from Jul, 2017 to May, 2018.

Answer:
user
Roberto Mancini
Sergei Semak
assistant
Question:
Who was the head coach of the team FC Zenit Saint Petersburg in Apr, 2013?

Context:
 Luciano Spalletti is the head coach of FC Zenit Saint Petersburg from Dec, 2009 to Mar, 2014. 
 Sergei Semak is the head coach of FC Zenit Saint Petersburg from May, 2018 to Dec, 2022. 
 Roberto Mancini is the head coach of FC Zenit Saint Petersburg from Jul, 2017 to May, 2018.

Answer:
user
Luciano Spalletti
assistant