Question: Erna Solberg and Thorstein Diesen were both members of the Conservative Party of what country?

Context paragraphs:
Erna Solberg: Erna Solberg (] ; born 24 February 1961) is a Norwegian politician who has been Prime Minister of Norway since October 2013 and Leader of the Conservative Party since May 2004.

Thorstein Diesen: Halvor Thorstein Romdal Diesen (7 December 1862 – 4 September 1925) was a Norwegian barrister, newspaper editor and politician for the Conservative Party.

Erik Skutle: Erik Skutle (born 7 January 1990) is a Norwegian politician for the Conservative Party.  He was elected as deputy to the Parliament of Norway from Hordaland in 2013.  He meets as deputy for Erna Solberg, and is member of the Standing Committee on Scrutiny and Constitutional Affairs.

Federation of Conservative Students: The Federation of Conservative Students (FCS) was the student organisation of the British Conservative Party from the late 1940s to 1986.  It was created to act as a bridge between the student movement and the Conservative Party.  In its final years it became known colloquially as "Maggie's Militant Tendency", in reference to then Prime Minister Margaret Thatcher and to Militant, an entryist group active in the Labour Party at the time.  The FCS was then broken up by the Chairman of the Conservative Party, Norman Tebbit, after one of its members had accused previous former Prime Minister Harold Macmillan of war crimes in extraditing Cossacks to the Soviet Union.  The FCS was replaced by the Conservative Collegiate Forum.

Progress Party (Norway): The Progress Party (Bokmål: "Fremskrittspartiet" , Nynorsk: "Framstegspartiet" , FrP) is a political party in Norway which identifies as classical liberal (libertarian) and conservative-liberal.  Academics broadly categorise the party as neoliberal populist, while the party itself, Norway's Prime Minister Erna Solberg, centrist parties, and some scholars reject any comparison with foreign right-wing populist parties.  In coalition with the Conservative Party, the party won the 2013 parliamentary election and entered into its first ever government.

Conservative Party (Norway): The Conservative Party (Bokmål: "Høyre" , Nynorsk: "Høgre" , H, literally "Right") is a conservative and liberal-conservative political party in Norway.  It is the major party of the Norwegian centre-right, and the leading party in the governing Solberg cabinet.  The current party leader is the Prime Minister of Norway Erna Solberg.

Lyng's Cabinet: Lyng's Cabinet governed Norway between 28 August 1963 and 25 September 1963.  It was the first in 28 years not to be led by the Norwegian Labour Party.  It was a centre-right coalition government of the Conservative Party, Centre Party, Christian Democratic Party and Liberal Party led by John Lyng of the Conservative Party.  It had fifteen members, of which five were from the Conservative Party, four were from the Centre Party, three were from the Christian Democratic Party and three were from the Liberal Party.  Karen Grønn-Hagen was the cabinet's only female member.

Office of the Prime Minister (Norway): The Norwegian Office of the Prime Minister (Norwegian: "Statsministerens kontor" ) is a political and bureaucratic office that assists the Cabinet of Norway and the Prime Minister of Norway in the leadership of the Cabinet and Government.  It has since 2013 been led by Prime Minister Erna Solberg (Conservative Party).  Minister and Chief of Staff is Julie Brodtkorb.  The office has about 60 employees.

Bård Hoksrud: Bård André Hoksrud (born 26 March 1973 in Porsgrunn) is a Norwegian politician for the Progress Party.  Since 2005, he has been a member of the "Storting", and from 2013 he has been State Secretary at the Ministry of Transport and Communications as a part of Erna Solberg's cabinet.

Vidar Helgesen: Vidar Helgesen (born 21 November 1968) is a Norwegian diplomat and politician for the Conservative party.  He was appointed Minister of Climate and the Environment on 16 December 2015, having served as Chief of Staff to Prime Minister Erna Solberg from 2013 to 2015.

Supporting paragraphs: Thorstein Diesen Conservative Party (Norway)
Answer: Norway