user: How long does it take to golf 18 holes?

assistant: It depends on the number of players in your group and course conditions.  A solo round of 18 holes will take 2.5-3hrs, while it will take 3.5-4.5hrs for a group of four to complete their round under normal conditions.

user: Prepare the count of trains which serves Mount Prospect for each day in a week starting with Monday. Use the format “Day-Count” and each entry should be in a new line.

assistant: Monday-62
Tuesday-62
Wednesday-62
Thursday-62
Friday-62
Saturday-31
Sunday-19

user: When did mountain biking start?

assistant: Mountain biking as a sport came into existence in various areas in the USA in the late 1970s and early 1980s.  While many groups of riders in different US locations claim the birthright to mountain biking, it's clear that there wasn't a single person nor a single location that served as the starting point for the sport.  Riders in Crested Butte, CO, Marin County, CA, Mill Valley, CA, Cupertino, CA, and several other locations contributed significantly to the birth of the sport.

It wasn't until the late 1970s and early 1980s that bicycle companies began manufacturing mountain bikes with specific high-tech lightweight materials that popularized the sport.  Joe Breeze (Marin County) is often credited with building the first, purpose-built mountain bike in 1978.

It's important to note that there were mountain bike concepts and prototypes built well before this period, with the earliest concept belonging to the off-road bicycles used by the Buffalo Soldiers in 1896.