Task: Question Answering
Input (English): Passage: With a population of 80.2 million according to the 2011 census, rising to at least 81.9 million as of 31 December 2015, Germany is the most populous country in the European Union, the second most populous country in Europe after Russia, and the 16th most populous country in the world. Its population density stands at 227 inhabitants per square kilometre (588 per square mile). The overall life expectancy in Germany at birth is 80.19 years (77.93 years for males and 82.58 years for females). The fertility rate of 1.41 children born per woman (2011 estimates), below the replacement rate of 2.1, it remains considerably below the high of 5.28 children born per woman in 1884, or 8.33 births per 1000 inhabitants, is one of the lowest fertility rates in the world. Since the 1970s, Germany's death rate has exceeded its birth rate. However, Germany is witnessing increased birth rates and migration rates since the beginning of the 2010s, particularly a rise in the number of well-educated migrants. Germany has the 3rd oldest population in the world, with the average age of 47.4 years.Four sizeable groups of people are referred to as "national minorities" because their ancestors have lived in their respective regions for centuries: There is a Danish minority (about 50,000) in the northernmost state of Schleswig-Holstein; the Sorbs, a Slavic population of about 60,000, are in the Lusatia region of Saxony and Brandenburg.; the Roma and Sinti live throughout country; and the Frisians are concentrated in Schleswig-Holstein's western coast and in the north-western part of Lower Saxony.Approximately 5 million Germans live abroad (Auslandsdeutsche). 
Question: What are the names of the national minorities?
Output (English): Sinti.