Answer the question at the end by quoting:

Evita is a musical with music by Andrew Lloyd Webber and lyrics by Tim Rice. It concentrates on the life of Argentine political leader Eva Peron, the second wife of Argentine president Juan Peron. The story follows Evita's early life, rise to power, charity work, and eventual death. The musical began as a rock opera concept album released in 1976.
In 1972, Robert Stigwood proposed that Andrew Lloyd Webber and Tim Rice develop a new musical version of Peter Pan, but they abandoned the project. Travelling late to a meal one night in 1973, though, Rice heard the end of a radio show about Eva Peron which intrigued him. As a child stamp collector, he had been fascinated by her image on the Argentine stamps, but was unaware of her significance in Argentina's history. He began research and was introduced by a Cinema International Corporation executive to the Argentine film director Carlos Pasini Hansen who had produced the TV film Queen of Hearts, which had aired in the UK on 24 October 1972. The executive also arranged for Rice to see the film at Thames Television which he did "at least twenty times" saying also that "by that time I had seen Pasini's superbly researched film, I was hooked." The more Rice investigated Eva Peron, going so far as to travel to Buenos Aires to research her life with many documents and contacts that Pasini had supplied, the more fascinated he became by the woman; he even named his first daughter after her. Rice suggested the idea of a musical based on the subject to Lloyd Webber, but although the idea of writing a score including tangos, pasos dobles, and similar Latin flavours intrigued him, Lloyd Webber ultimately rejected the idea. He decided instead to collaborate with Alan Ayckbourn on Jeeves, a traditional Rodgers and Hart-style musical based on the P. G. Wodehouse character, which proved to be a critical and commercial failure. After Jeeves, Lloyd Webber returned to Rice, and they began developing Rice's proposed musical. The authors of the 1996 book Evita: The Real Life of Eva Peron claim the musical was based on Mary Main's biography The Woman with the Whip, which was extremely critical of Eva Peron. Though Rice praised the Main biography, it was never officially credited as source material. Rice created a character, Che, to serve as a narrator and Greek chorus. Although he had recently discovered Che Guevara was Argentine, he did not necessarily intend that the character be based upon him, despite inserting specific biographical details into the lyrics that clearly apply to Guevara. When Harold Prince later became involved with the project, he insisted that the actors portraying Che should use Guevara as a role model. In the 1996 film adaptation, the character returned to his more anonymous roots. This was also the case for the 2006 London revival. Lloyd Webber and the conductor Anthony Bowles presented the musical at the second Sydmonton Festival before making the recording with the London Philharmonic Orchestra.

What did he realize

He began research and was introduced by a Cinema International Corporation executive to the Argentine film director Carlos Pasini Hansen who had produced the TV film Queen of Hearts,

Answer the question at the end by quoting:

Marie Charlotte Carmichael Stopes (15 October 1880 - 2 October 1958) was a British author, palaeobotanist and campaigner for eugenics and women's rights. She made significant contributions to plant palaeontology and coal classification, and was the first female academic on the faculty of the University of Manchester. With her second husband, Humphrey Verdon Roe, Stopes founded the first birth control clinic in Britain. Stopes edited the newsletter Birth Control News, which gave explicit practical advice.
Around the start of her divorce proceedings in 1913, Stopes began to write a book about the way she thought marriage should work. In July 1913, she met Margaret Sanger, who had just given a talk on birth control at a Fabian Society meeting. Stopes showed Sanger her writings and sought her advice about a chapter on contraception. Stopes' book was finished by the end of 1913. She offered it to Blackie and Son, who declined. Several publishers refused the book because they thought it too controversial. When Binnie Dunlop, secretary of the Malthusian League, introduced her to Humphrey Verdon Roe--Stopes' future second husband--in 1917, she received the boost that helped her publish her book. Roe was a philanthropist interested in birth control; he paid Fifield & Co. to publish the work. The book was an instant success, requiring five editions in the first year, and elevated Stopes to national prominence. Married Love was published on 26 March 1918; that day, Stopes was visiting Humphrey Roe, who had just returned with a broken ankle from service during the First World War after his aeroplane crashed. Less than two months later they were married and Stopes had her first opportunity to practise what she preached in her book. The success of Married Love encouraged Stopes to provide a follow-up; the already written Wise Parenthood: a Book for Married People, a manual on birth control that was published later that year. Many readers wrote to Stopes for personal advice, which she energetically endeavoured to give. The following year, Stopes published A Letter to Working Mothers on how to have healthy children and avoid weakening pregnancies, a condensed version of Wise Parenthood aimed at the poor. It was a 16-page pamphlet and was to be distributed free of charge. Stopes's intended audience had--until this work--been the middle classes. She had shown little interest in, or respect for, the working classes; the Letter was aimed at redressing her bias. On 16 July 1919, Stopes--pregnant and a month overdue--entered a nursing home. Stopes and the doctors clashed over the method of birth--she was not allowed to give birth on her knees. The child was stillborn; the doctors suggested the incident was due to syphilis, but an examination excluded the possibility. Stopes was furious and said her baby had been murdered. She was 38 years old.

What is married love?
Stopes began to write a book about the way she thought marriage should work.