Question: Who is the father-in-law of Dimitra Liani?

Knowledge 1: Dimitra Liani
Dimitra Liani (born 30 April 1955) was the third wife of former Greek Prime Minister Andreas Papandreou. [SEP] Knowledge 2: Andreas Papandreou
Andreas Georgios Papandreou (5 February 1919 – 23 June 1996) was a Greek economist, politician and a dominant figure in Greek politics, known for founding the political party PASOK, which he led from 1974 to 1996.He served three terms as prime minister of Greece, and is frequently regarded as one of the greatest modern Prime Ministers of the country.Papandreou's party win in the 1981 election was a milestone in the political history of Greece, since it was the first time that the elected government had a predominantly socialist political program.The achievements of his first two governments include the official recognition of the leftist and communist resistance groups of the Greek Resistance (EAM/ELAS) against the Axis occupation, the establishment of the National Health System and the Supreme Council for Personnel Selection (ASEP), the passage of Law 1264/1982 which secured the right to strike and greatly improved the rights of workers, the constitutional amendment of 1985–1986 which strengthened parliamentarism and reduced the powers of the indirectly-elected president, the conduct of an assertive and independent Greek foreign policy, the expansion in the power of local governments, many progressive reforms in Greek law and the granting of permission to the refugees of the Greek Civil War, of Greek ethnicity, to return home in Greece.The Panhellenic Socialist Movement (PASOK), which he founded and led, was the first non-communist political party in Greek history with a mass-based organization, introducing an unprecedented level of political and social participation in Greek society.In a poll conducted by Kathimerini in 2007, 48% of those polled called Papandreou the "most important Greek Prime Minister".In the same poll, the first four years of Papandreou's government after Metapolitefsi were voted as the best government Greece ever had.His father, Georgios Papandreou, and his son, George Papandreou have both also served as Prime Ministers of Greece.
Knowledge 1: Dimitra Liani
Dimitra Liani (born 30 April 1955) was the third wife of former Greek Prime Minister Andreas Papandreou. [SEP] Knowledge 2: Barthold A. Butenschøn Sr.
Hans Barthold Andresen Butenschøn( 27 December 1877 – 28 November 1971) was a Norwegian businessperson.He was born in Kristiania as a son of Nils August Andresen Butenschøn and Hanna Butenschøn, and grandson of Nicolay Andresen.Together with Mabel Anette Plahte( 1877 – 1973, a daughter of Frithjof M. Plahte) he had the son Hans Barthold Andresen Butenschøn Jr. and was through him the father- in- law of Ragnhild Butenschøn and grandfather of Peter Butenschøn.Through his daughter Marie Claudine he was the father- in- law of Joakim Lehmkuhl, through his daughter Mabel Anette he was the father- in- law of Harald Astrup( a son of Sigurd Astrup) and through his daughter Nini Augusta he was the father- in- law of Ernst Torp.He took commerce school and agricultural school.He was hired in the family company N. A. Andresen& Co, and became a co-owner in 1910.He eventually became chief executive officer.The bank changed its name to Andresens Bank in 1913 and merged with Bergens Kreditbank in 1920.The merger was dissolved later in the 1920s.He was also a landowner, owning Nedre Skøyen farm and a lot of land in Enebakk.He chaired the board of Nydalens Compagnie from 1926, having not been a board member before that.He also chaired the supervisory council of Forsikringsselskapet Viking and Nedre Glommen salgsforening, and was a supervisory council member of Filharmonisk Selskap.He was a member of the gentlemen's club SK Fram since 1890, and was proclaimed a lifetime member in 1964.He was buried in Enebakk.
Knowledge 1: Andreas Papandreou
Andreas Georgios Papandreou (5 February 1919 – 23 June 1996) was a Greek economist, politician and a dominant figure in Greek politics, known for founding the political party PASOK, which he led from 1974 to 1996.He served three terms as prime minister of Greece, and is frequently regarded as one of the greatest modern Prime Ministers of the country.Papandreou's party win in the 1981 election was a milestone in the political history of Greece, since it was the first time that the elected government had a predominantly socialist political program.The achievements of his first two governments include the official recognition of the leftist and communist resistance groups of the Greek Resistance (EAM/ELAS) against the Axis occupation, the establishment of the National Health System and the Supreme Council for Personnel Selection (ASEP), the passage of Law 1264/1982 which secured the right to strike and greatly improved the rights of workers, the constitutional amendment of 1985–1986 which strengthened parliamentarism and reduced the powers of the indirectly-elected president, the conduct of an assertive and independent Greek foreign policy, the expansion in the power of local governments, many progressive reforms in Greek law and the granting of permission to the refugees of the Greek Civil War, of Greek ethnicity, to return home in Greece.The Panhellenic Socialist Movement (PASOK), which he founded and led, was the first non-communist political party in Greek history with a mass-based organization, introducing an unprecedented level of political and social participation in Greek society.In a poll conducted by Kathimerini in 2007, 48% of those polled called Papandreou the "most important Greek Prime Minister".In the same poll, the first four years of Papandreou's government after Metapolitefsi were voted as the best government Greece ever had.His father, Georgios Papandreou, and his son, George Papandreou have both also served as Prime Ministers of Greece. [SEP] Knowledge 2: Barthold A. Butenschøn Sr.
Hans Barthold Andresen Butenschøn( 27 December 1877 – 28 November 1971) was a Norwegian businessperson.He was born in Kristiania as a son of Nils August Andresen Butenschøn and Hanna Butenschøn, and grandson of Nicolay Andresen.Together with Mabel Anette Plahte( 1877 – 1973, a daughter of Frithjof M. Plahte) he had the son Hans Barthold Andresen Butenschøn Jr. and was through him the father- in- law of Ragnhild Butenschøn and grandfather of Peter Butenschøn.Through his daughter Marie Claudine he was the father- in- law of Joakim Lehmkuhl, through his daughter Mabel Anette he was the father- in- law of Harald Astrup( a son of Sigurd Astrup) and through his daughter Nini Augusta he was the father- in- law of Ernst Torp.He took commerce school and agricultural school.He was hired in the family company N. A. Andresen& Co, and became a co-owner in 1910.He eventually became chief executive officer.The bank changed its name to Andresens Bank in 1913 and merged with Bergens Kreditbank in 1920.The merger was dissolved later in the 1920s.He was also a landowner, owning Nedre Skøyen farm and a lot of land in Enebakk.He chaired the board of Nydalens Compagnie from 1926, having not been a board member before that.He also chaired the supervisory council of Forsikringsselskapet Viking and Nedre Glommen salgsforening, and was a supervisory council member of Filharmonisk Selskap.He was a member of the gentlemen's club SK Fram since 1890, and was proclaimed a lifetime member in 1964.He was buried in Enebakk.

Answer: Georgios Papandreou