Question:
Who was the head coach of the team FC Bayern Munich in Sep, 2018?

Context:
 Giovanni Trapattoni is the head coach of FC Bayern Munich from Jul, 1994 to Jun, 1995. 
 Carlo Ancelotti is the head coach of FC Bayern Munich from Jul, 2016 to Sep, 2017. 
 Jupp Heynckes is the head coach of FC Bayern Munich from Jul, 1987 to Oct, 1991. 
 Hansi Flick is the head coach of FC Bayern Munich from Nov, 2019 to Jun, 2021. 
 Josep Guardiola is the head coach of FC Bayern Munich from Jun, 2013 to May, 2016. 
 Ottmar Hitzfeld is the head coach of FC Bayern Munich from Jan, 2007 to Jan, 2008. 
 Jürgen Klinsmann is the head coach of FC Bayern Munich from Jan, 2008 to Jan, 2009. 
 Niko Kovač is the head coach of FC Bayern Munich from Jul, 2018 to Nov, 2019. 
 Julian Nagelsmann is the head coach of FC Bayern Munich from Jul, 2021 to Dec, 2022. 
 Andries Jonker is the head coach of FC Bayern Munich from Apr, 2011 to Jun, 2011. 
 Louis van Gaal is the head coach of FC Bayern Munich from Jul, 2009 to Apr, 2011.

Answer:
Niko Kovač