Question: Where was the German campaign in the country where the team that has won the most portuguese league title plays?

full_context: Document 1: José Luís: Born in Lisbon, José Luís was promoted to hometown's S.L. Benfica's first team at only 18, finishing his first season with 25 matches, 20 starts and two goals as the club won the Primeira Liga championship. Until the end of his tenure he was irregularly used, his best years being 1983 to 1985 as he appeared in 57 games combined – six goals – and won the 1984 league and the following year's Portuguese Cup; he also played the full 90 minutes in the 1982–83 UEFA Cup final's first hand, a 0–1 away loss against R.S.C. Anderlecht (1–2 on aggregate).
Document 2: List of Portuguese football champions: S.L. Benfica, with 36 titles, have been crowned champions more times than any other club, and dominated the league during the 1960s and 1970s. Benfica are followed by Porto with 28 titles, who dominated in the 1990s and 2000s, who in turn are followed by Sporting CP with 18 titles, they dominated in the 1940s and 1950s. C.F. Os Belenenses and Boavista F.C. are the only other clubs which managed to win the league, each having won it once. All five clubs are from the two largest cities, of Lisbon and Porto respectively.
Document 3: La Liga: 62 teams have competed in La Liga since its inception. Nine teams have been crowned champions, with Real Madrid winning the title a record 33 times and Barcelona 25 times. Barcelona won the inaugural La Liga in 1929 with Athletic Bilbao claiming several titles in the league's early years. Barcelona and Real Madrid dominated the championship in the 1950s, winning four La Liga titles each throughout the decade. Real Madrid dominated La Liga from the 1960s through the 1980s, when Barcelona, Athletic Bilbao, and Real Sociedad won the league twice in those years. From the 1990s onward, Barcelona has dominated La Liga, winning 15 titles. Although Real Madrid has been prominent, winning 8 titles, La Liga has also seen other champions, including Atlético Madrid, Valencia, and Deportivo de La Coruña. In the 2010s, Atlético Madrid has become an increasingly stronger team, forming a trio alongside Real Madrid and Barcelona.
Document 4: British Empire: Britain's fears of war with Germany were realised in 1914 with the outbreak of the First World War. Britain quickly invaded and occupied most of Germany's overseas colonies in Africa. In the Pacific, Australia and New Zealand occupied German New Guinea and Samoa respectively. Plans for a post-war division of the Ottoman Empire, which had joined the war on Germany's side, were secretly drawn up by Britain and France under the 1916 Sykes–Picot Agreement. This agreement was not divulged to the Sharif of Mecca, who the British had been encouraging to launch an Arab revolt against their Ottoman rulers, giving the impression that Britain was supporting the creation of an independent Arab state.
Document 5: Portugal: In the 20th century, Portugal engaged in two major conflicts: World War I and the Portuguese Colonial War (1961–1974). After the end of the Portuguese Empire in 1975, the Portuguese Armed Forces have participated in peacekeeping missions in East Timor, Bosnia, Kosovo, Afghanistan, Somalia, Iraq (Nasiriyah) and Lebanon. Portugal also conducted several independent unilateral military operations abroad, as were the cases of the interventions of the Portuguese Armed Forces in Angola in 1992 and in Guinea-Bissau in 1998 with the main objectives of protecting and withdrawing of Portuguese and foreign citizens threatened by local civil conflicts.
Document 6: SC Cilu: Sporting Club Cilu is a football club in Lukala, Democratic Republic of Congo.  They play in the Linafoot, the top level of professional football in DR Congo.  They competed in the 2004 CAF Champions League, going out in the first round, and won the Unifac Clubs Cup in 2006
Document 7: History of Angola: Angola is a country in southwestern Africa. The country's name derives from the Kimbundu word for king. It was first settled by San hunter - gatherer societies before the northern domains came under the rule of Bantu states such as Kongo and Ndongo. From the 15th century, Portuguese colonists began trading, and a settlement was established at Luanda during the 16th century. Portugal annexed territories in the region which were ruled as a colony from 1655, and Angola was incorporated as an overseas province of Portugal in 1951. After the Angolan War of Independence which ended with an army mutiny and leftist coup in Lisbon, Angola's independence was achieved on November 11, 1975 through the Alvor Agreement. After independence, Angola later entered a period of civil war that lasted up until 2002.
Document 8: German campaign in Angola: Before the official declaration of war between Germany and Portugal (March 1916), German and Portuguese troops clashed several times on the border between German South West Africa and Portuguese Angola. The Germans won most of these clashes and were able to occupy the Humbe region of southern Angola until Portuguese control was restored a few days before the British campaign out of South Africa defeated the Germans.
Document 9: Estádio da Luz: The Estádio da Luz (), officially named Estádio do Sport Lisboa e Benfica, is a multi-purpose stadium located in Lisbon, Portugal. It is used mostly for association football matches, hosting the home games of Portuguese club S.L. Benfica. It is owned by the club's SAD.
Document 10: Estádio dos Coqueiros: Estádio dos Coqueiros is a multi-use stadium in Luanda, Angola. It is currently used mostly for football matches and is the home ground of Benfica de Luanda and Kabuscorp. The stadium holds 12,000 people and was built during the colonial period, in 1947. It underwent major renovation works in 2005.
Document 11: Associação Naval de Lisboa: Founded in 1856, Associação Naval de Lisboa (Lisbon Naval Association) is the oldest sport club of Portugal and one of the 30 oldest yacht clubs in Europe.
Document 12: History of Germany during World War I: During World War I, the German Empire was one of the Central Powers that lost the war. It began participation in the conflict after the declaration of war against Serbia by its ally, Austria - Hungary. German forces fought the Allies on both the eastern and western fronts, although German territory itself remained relatively safe from widespread invasion for most of the war, except for a brief period in 1914 when East Prussia was invaded. A tight blockade imposed by the Royal Navy caused severe food shortages in the cities, especially in the winter of 1916 -- 17, known as the Turnip Winter. At the end of the war, Germany's defeat and widespread popular discontent triggered the German Revolution of 1918 -- 19 which overthrew the monarchy and established the Weimar Republic.
Document 13: S.L. Benfica (Luanda): Sport Luanda e Benfica, commonly known as Benfica de Luanda, or simply as Benfica, is a football club from Luanda, Angola. The club was established as the Luanda affiliate of SL Benfica of Portugal, and shares the same colours. The logo is also very similar to the Portuguese one. The club, as of 2005, has never won the Girabola (the Angolan league first division). The club plays in the Girabola.
Document 14: Portugal: Football is the most popular sport in Portugal. There are several football competitions ranging from local amateur to world-class professional level. The legendary Eusébio is still a major symbol of Portuguese football history. FIFA World Player of the Year winners Luís Figo and Cristiano Ronaldo who won the FIFA Ballon d'Or for 2013 and 2014, are among the numerous examples of other world-class football players born in Portugal and noted worldwide. Portuguese football managers are also noteworthy, with José Mourinho, André Villas-Boas, Fernando Santos, Carlos Queiroz and Manuel José among the most renowned.
Document 15: Portugal: SL Benfica, FC Porto, and Sporting CP are the largest sports clubs by popularity and by number of trophies won, often known as "os três grandes" ("the big three"). They have won eight titles in the European UEFA club competitions, were present in many finals and have been regular contenders in the last stages almost every season. Other than football, many Portuguese sports clubs, including the "big three", compete in several other sports events with a varying level of success and popularity, these may include roller hockey, basketball, futsal, handball, and volleyball. The Portuguese Football Federation (FPF)  – Federação Portuguesa de Futebol – annually hosts the Algarve Cup, a prestigious women`s football tournament that has been celebrated in the Algarvian part of Portugal.
ground_truth: Portuguese Angola
sub_queries: who has won the most portuguese league titles Answer: S.L. Benfica
S.L. Benfica >> country Answer: Angola
German campaign in Angola >> location Answer: Portuguese Angola