Question:
Who was the head coach of the team Villarreal Club de Fútbol in Dec, 2018?

Context:
 Javier Calleja is the head coach of Villarreal Club de Fútbol from Jan, 2019 to Jul, 2020. 
 Luis García Plaza is the head coach of Villarreal Club de Fútbol from Dec, 2018 to Jan, 2019. 
 Unai Emery is the head coach of Villarreal Club de Fútbol from Jul, 2020 to Dec, 2022. 
 Ernesto Valverde is the head coach of Villarreal Club de Fútbol from Jun, 2009 to Jan, 2010.

Answer:
Question:
Who was the head coach of the team Villarreal Club de Fútbol in Dec, 2018?

Context:
 Javier Calleja is the head coach of Villarreal Club de Fútbol from Jan, 2019 to Jul, 2020. 
 Luis García Plaza is the head coach of Villarreal Club de Fútbol from Dec, 2018 to Jan, 2019. 
 Unai Emery is the head coach of Villarreal Club de Fútbol from Jul, 2020 to Dec, 2022. 
 Ernesto Valverde is the head coach of Villarreal Club de Fútbol from Jun, 2009 to Jan, 2010.

Answer:
user
Luis García Plaza
assistant
Question:
Who was the head coach of the team Villarreal Club de Fútbol in Dec, 2018?

Context:
 Javier Calleja is the head coach of Villarreal Club de Fútbol from Jan, 2019 to Jul, 2020. 
 Luis García Plaza is the head coach of Villarreal Club de Fútbol from Dec, 2018 to Jan, 2019. 
 Unai Emery is the head coach of Villarreal Club de Fútbol from Jul, 2020 to Dec, 2022. 
 Ernesto Valverde is the head coach of Villarreal Club de Fútbol from Jun, 2009 to Jan, 2010.

Answer:
user
Javier Calleja
Ernesto Valverde
Unai Emery
assistant
Question:
Who was the head coach of the team Villarreal Club de Fútbol in Dec, 2018?

Context:
 Javier Calleja is the head coach of Villarreal Club de Fútbol from Jan, 2019 to Jul, 2020. 
 Luis García Plaza is the head coach of Villarreal Club de Fútbol from Dec, 2018 to Jan, 2019. 
 Unai Emery is the head coach of Villarreal Club de Fútbol from Jul, 2020 to Dec, 2022. 
 Ernesto Valverde is the head coach of Villarreal Club de Fútbol from Jun, 2009 to Jan, 2010.

Answer:
user
Luis García Plaza
assistant