In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
Q: Stagecoach Merseyside & South Lancashire (Glenvale Transport Limited [In Liverpool]) is a major operator of bus services in North West England. It is a subsidiary of the Stagecoach Group, and has its origins in the purchase of Ribble in 1988 from the National Bus Company and Glenvale Transport in 2005. The head office of Stagecoach Merseyside & South Lancashire is in Liverpool and was formed in 2011 following the merger of Stagecoach Merseyside and Ribble Motor Services which was the Chorley and Preston operations of Stagecoach North West. Question: The head office of Stagecoach Merseyside & South Lancashire was formed following a merger containing the regional bus operator based in which Northwest England town? Answer: Preston
A:
The head office of Stagecoach Merseyside South Lancashire is in Liverpool and was formed in 2011 following the merger of Stagecoach Merseyside and Ribble Motor Services which was the Chorley and Preston operations of Stagecoach North West.