Context: Beer is composed mostly of water. Regions have water with different mineral components; as a result, different regions were originally better suited to making certain types of beer, thus giving them a regional character. For example, Dublin has hard water well-suited to making stout, such as Guinness; while the Plzeň Region has soft water well-suited to making Pilsner (pale lager), such as Pilsner Urquell. The waters of Burton in England contain gypsum, which benefits making pale ale to such a degree that brewers of pale ales will add gypsum to the local water in a process known as Burtonisation.

Question: What is the main ingredient in beer?
Answer: water

Question: What type of water is good for making stout beer, like Guinness?
Answer: hard water

Question: What type of water is best for making pale lager?
Answer: soft water

Question: What is the process called when gypsum is added to water?
Answer: Burtonisation

Question: What type of beer benefits most from water that contains gypsum?
Answer: pale ale

Question: What is composed of mostly beer?
Answer: Unanswerable

Question: What kind of beer is Dublin's soft water well-suited to make?
Answer: Unanswerable

Question: What kind of beer is the Plzen Region's hard water well-suited to make?
Answer: Unanswerable

Question: What kind of beer is the Urquell waters in England ideal for?
Answer: Unanswerable