Question: Who was the interviewee in an interview arranged by a co-founder of the the "Sturmabteilung" for British journalist Sefton Delmer in 1931?

Context paragraphs:
Karl Dallas: Karl Frederick Dallas (29 January 1931 – 21 June 2016) was a British journalist, musician, author, playwright, peace campaigner, record producer, and broadcaster.  He was described as "the most vigorous, influential, and informed folk music journalist in Britain".

Libya Herald: The Libya Herald (Arabic: ليبيا هيرلد‎ ‎ ) is an English-language newspaper based in Tripoli, Libya.  It was launched on 17 February 2012, the first anniversary of the outbreak of the Libyan Civil War, and currently publishes news through its website, though plans are in place to launch a print edition in the near future.  The Libya Herald was the initiative of Michel Cousins, a British journalist raised in Libya who has worked in the Arab world for much of his career.  Cousins co-founded the paper together with Sami Zaptia, a Libyan journalist who worked for the state-owned "Tripoli Post" for ten years but resigned upon the outbreak of the Libyan Civil War, frustrated at the Gaddafi regime's strict censorship.  Until January 2013, the paper's deputy editor was George Grant, a British journalist who also worked as Libya correspondent for "The Times" newspaper.  Grant was subsequently forced to leave Libya following an abduction threat from suspected Islamists in Benghazi following an investigation he was conducting into a death list in the city.

Sefton Delmer: Denis Sefton Delmer (24 May 1904 – 4 September 1979) was a British journalist of Australian heritage and propagandist for the British government.  Fluent in German, he became friendly with Ernst Röhm who arranged for him to interview Adolf Hitler in 1931.  During the Second World War he led a black propaganda campaign against Hitler by radio from England, so successful that he was named in the Nazis' Black Book for immediate arrest after their invasion of England.

Isabel Nicholas: Isabel Rawsthorne, also known as Isabel Lambert, (1912 – 1992) was a British painter, designer and occasional artists' model.  During the war she worked in Black Propaganda.  She was intimate with many members of the artistic bohemian society in which she flourished, including Jacob Epstein, Alberto Giacometti and Francis Bacon, and was married three times; to the journalist Sefton Delmer, and to the composers Constant Lambert and Alan Rawsthorne.

Star Test (TV series): Star Test was a British TV programme that ran from 1989 to 1991 on Channel 4.  The show took an interview format, in which the guest "star" was seated facing directly to camera, questioned by an unseen voice (Kara Noble).  The topics discussed were chosen from an on-screen menu, after which the interviewee selected questions by number from an unseen list.  The show was lampooned in two British comedy sketch shows; "French and Saunders" and "Bo' Selecta! ", the latter being some 12 years after Star Test ended.

Gustav Siegfried Eins: Gustav Siegfried Eins (GS1) was a British black propaganda radio station during World War II operated by the Political Warfare Executive (PWE).  It was the brainchild of Sefton Delmer, a former BBC German service announcer recruited by PWE in 1940, and claimed to be an illegal radio station operating within Nazi Germany.  The callsign was based on the German Army phonetic alphabet for the letters GS, but had no meaning.

Deterritorial Support Group: The Deterritorial Support Group (DSG) is an internet-based political entity that emerged early in the second decade of the 21st century.  Named in derisive homage to the London Metropolitan riot police unit the Territorial Support Group, the group was said by "The Guardian" to have "cast a long shadow over politics in 2011" through the viral spread of the output of their self-described "ultra-left propaganda machine" throughout mainstream media discourse.  , it was composed of 10-20 North London-based underemployed graduate students with "no future" who were radicalised by the 2010 UK student protests.  The group played a part in the downfall of British journalist Johann Hari by discovering plagiarized quotes in Hari's interview of the Italian author Antonio Negri.  They characterise themselves as ultra-leftist and anti-authoritarian communists.

Ernst Röhm: Ernst Julius Günther Röhm (] ; 28 November 1887 – 1 July 1934) was a German military officer and an early member of the Nazi Party.  As one of the members of its predecessor, the German Workers' Party, he was a close friend and early ally of Adolf Hitler and a co-founder of the "Sturmabteilung " (SA, "Storm Battalion"), the Nazi Party's militia, and later was its commander.  By 1934, the German Army feared the SA's influence and Hitler had come to see Röhm as a potential rival, so he was executed during the Night of the Long Knives.

Gerri Peev: Gerri Peev is a Bulgarian-born, New Zealand-raised British journalist.  Peev is notable for authoring a 7 March 2008 interview in "The Scotsman" with Samantha Power, a foreign policy advisor to U.S. presidential candidate Barack Obama.  During an interview, Power said of Obama's Democratic primary opponent Hillary Clinton: "She is a monster, too – that is off the record – she is stooping to anything."  Peev included the remark in her article in The Scotsman, despite Power's post facto declaration that it was off the record.  Power resigned after the article was published.

La Entrevista: La Entrevista (English: The Interview ) is a Spanish-language television news program aired by Radio Caracas Televisión (RCTV) in Venezuela.  It is presented daily by journalist Miguel Ángel Rodríguez, and the invited interviewee, which are often either political personalities or other journalists.  It broadcasts live from the "Centro Nacional de Noticias" ("National Center for News"), the same center where "El Observador", RCTV's newscast, set is located.  In the past, the program had been hosted by Ana Vacarella and Luisana Ríos.

Supporting paragraphs: Sefton Delmer Ernst Röhm
Answer: Adolf Hitler