Please answer the following question: Information: - Giovanni Giolitti (October 27, 1842 July 17, 1928) was an Italian statesman. He was the Prime Minister of Italy five times between 1892 and 1921. He is the second-longest serving Prime Minister in Italian history, after Benito Mussolini. He was a prominent leader of the Italian Liberal Party (PLI). - Benito Amilcare Andrea Mussolini (29 July 1883 28 April 1945) was an Italian politician, journalist, and leader of the National Fascist Party ("Partito Nazionale Fascista"; PNF), ruling the country as Prime Minister from 1922 to 1943. He ruled constitutionally until 1925, when he dropped all pretense of democracy and set up a legal dictatorship. Known as "Il Duce" (The Leader), Mussolini was the founder of Italian Fascism. - The Italian Social Democratic Party (PDSI), or simply Social Democracy, was a social-liberal political party in Italy. - The Labour Democratic Party ( Italian : Partito Democratico del Lavoro , PDL ) was a social - liberal political party in Italy , founded in 1943 as the heir of defunct Italian Social Democratic Party , formed by those Socialists who wanted to cooperate with the Liberal political guard which governed Italy from the days of Giovanni Giolitti . Leading members of the party were Ivanoe Bonomi , Meuccio Ruini and Enrico Mole . The party inheredited the symbol of its ancestor , a torch with a tricolour flame . - The Italian Liberal Party (PLI) was a liberal and conservative political party in Italy. Given the information above, choose from the list below the object entity that exhibits the relation 'political ideology' with the subject 'labour democratic party'. Choices: - democracy - fascism - liberal - social democracy
Answer:
social democracy