Question: What does the Hacker-Pschorr Brewery have to limit in order to comply with German regulations?
Related documents: [0]  [DOC] Hacker-Pschorr is a brewery in Munich, formed in 1972 out of the merger of two breweries, Hacker and Pschorr. Hacker was founded in 1417, 99 years before the enactment of the Reinheitsgebot Purity Law of 1516. [END] 
[1]  [DOC] The Reinheitsgebot (] , literally "purity order"), sometimes called the "German Beer Purity Law" in English, is the collective name for a series of regulations limiting the ingredients in beer in Germany and the states of the former Holy Roman Empire. The best-known version of the law was adopted in Bavaria in 1516, but similar regulations predate the Bavarian order, and modern regulations also significantly differ from the 1516 Bavarian version. [END] 
Answer: 
ingredients in beer
ingredients in beer