Question:
Who was the head coach of the team Columbus Crew in Aug, 2019?

Context:
 Brian Bliss is the head coach of Columbus Crew from Sep, 2013 to Nov, 2013. 
 Caleb Porter is the head coach of Columbus Crew from Jan, 2019 to Dec, 2022. 
 Greg Andrulis is the head coach of Columbus Crew from May, 2001 to Jul, 2005. 
 Gregg Berhalter is the head coach of Columbus Crew from Nov, 2013 to Dec, 2018. 
 Sigi Schmid is the head coach of Columbus Crew from Oct, 2005 to Dec, 2008. 
 Robert Warzycha is the head coach of Columbus Crew from Dec, 2008 to Sep, 2013. 
 Timo Liekoski is the head coach of Columbus Crew from Dec, 1995 to Aug, 1996.

Answer:
Question:
Who was the head coach of the team Columbus Crew in Aug, 2019?

Context:
 Brian Bliss is the head coach of Columbus Crew from Sep, 2013 to Nov, 2013. 
 Caleb Porter is the head coach of Columbus Crew from Jan, 2019 to Dec, 2022. 
 Greg Andrulis is the head coach of Columbus Crew from May, 2001 to Jul, 2005. 
 Gregg Berhalter is the head coach of Columbus Crew from Nov, 2013 to Dec, 2018. 
 Sigi Schmid is the head coach of Columbus Crew from Oct, 2005 to Dec, 2008. 
 Robert Warzycha is the head coach of Columbus Crew from Dec, 2008 to Sep, 2013. 
 Timo Liekoski is the head coach of Columbus Crew from Dec, 1995 to Aug, 1996.

Answer:
user
Caleb Porter
assistant
Question:
Who was the head coach of the team Columbus Crew in Aug, 2019?

Context:
 Brian Bliss is the head coach of Columbus Crew from Sep, 2013 to Nov, 2013. 
 Caleb Porter is the head coach of Columbus Crew from Jan, 2019 to Dec, 2022. 
 Greg Andrulis is the head coach of Columbus Crew from May, 2001 to Jul, 2005. 
 Gregg Berhalter is the head coach of Columbus Crew from Nov, 2013 to Dec, 2018. 
 Sigi Schmid is the head coach of Columbus Crew from Oct, 2005 to Dec, 2008. 
 Robert Warzycha is the head coach of Columbus Crew from Dec, 2008 to Sep, 2013. 
 Timo Liekoski is the head coach of Columbus Crew from Dec, 1995 to Aug, 1996.

Answer:
user
Greg Andrulis
Gregg Berhalter
Brian Bliss
Sigi Schmid
Timo Liekoski
Robert Warzycha
assistant
Question:
Who was the head coach of the team Columbus Crew in Aug, 2019?

Context:
 Brian Bliss is the head coach of Columbus Crew from Sep, 2013 to Nov, 2013. 
 Caleb Porter is the head coach of Columbus Crew from Jan, 2019 to Dec, 2022. 
 Greg Andrulis is the head coach of Columbus Crew from May, 2001 to Jul, 2005. 
 Gregg Berhalter is the head coach of Columbus Crew from Nov, 2013 to Dec, 2018. 
 Sigi Schmid is the head coach of Columbus Crew from Oct, 2005 to Dec, 2008. 
 Robert Warzycha is the head coach of Columbus Crew from Dec, 2008 to Sep, 2013. 
 Timo Liekoski is the head coach of Columbus Crew from Dec, 1995 to Aug, 1996.

Answer:
user
Caleb Porter
assistant