Question:
Who was the head coach of the team FC Luzern in Dec, 2018?

Context:
 Mario Frick is the head coach of FC Luzern from Dec, 2021 to Dec, 2022. 
 Fabio Celestini is the head coach of FC Luzern from Jan, 2020 to Nov, 2021. 
 René Weiler is the head coach of FC Luzern from Jun, 2018 to Feb, 2019.

Answer:
Question:
Who was the head coach of the team FC Luzern in Dec, 2018?

Context:
 Mario Frick is the head coach of FC Luzern from Dec, 2021 to Dec, 2022. 
 Fabio Celestini is the head coach of FC Luzern from Jan, 2020 to Nov, 2021. 
 René Weiler is the head coach of FC Luzern from Jun, 2018 to Feb, 2019.

Answer:
user
René Weiler
assistant
Question:
Who was the head coach of the team FC Luzern in Dec, 2018?

Context:
 Mario Frick is the head coach of FC Luzern from Dec, 2021 to Dec, 2022. 
 Fabio Celestini is the head coach of FC Luzern from Jan, 2020 to Nov, 2021. 
 René Weiler is the head coach of FC Luzern from Jun, 2018 to Feb, 2019.

Answer:
user
Fabio Celestini
Mario Frick
assistant
Question:
Who was the head coach of the team FC Luzern in Dec, 2018?

Context:
 Mario Frick is the head coach of FC Luzern from Dec, 2021 to Dec, 2022. 
 Fabio Celestini is the head coach of FC Luzern from Jan, 2020 to Nov, 2021. 
 René Weiler is the head coach of FC Luzern from Jun, 2018 to Feb, 2019.

Answer:
user
René Weiler
assistant