Question:
Who was the head coach of the team Bristol Rovers F.C. in Oct, 2015?

Context:
 Darrell Clarke is the head coach of Bristol Rovers F.C. from Mar, 2014 to Dec, 2018. 
 Paul Tisdale is the head coach of Bristol Rovers F.C. from Nov, 2020 to Dec, 2022. 
 Graham Coughlan is the head coach of Bristol Rovers F.C. from Jan, 2019 to Dec, 2019. 
 John Ward is the head coach of Bristol Rovers F.C. from Dec, 2012 to Mar, 2014.

Answer:
Darrell Clarke