In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: John Silvester, the Recorder of London referenced the spectre of Napoleon Bonaparte and the burgeoning Napoleonic Wars in his announcement of Perring's appointment, stating that "At a time so awful as the present, when the country is threatened by an implacable and unprincipled enemy, it is of the last importance that the civic chair should be filled by a person in whom the greatest confidence can be placed". Silvester ominously warned Perring that "The keys of the Metropolis are placed in your hands, at the moment when the enemy are at the gates". The ball held later that day at Guildhall was opened with a minuet danced by Perring's eldest daughter and the Spanish Ambassador. The Napoleonic wars and the threat of a French invasion had led to coastal batteries being built as fortifications along the south coast of England in the summer of 1803. Perring was furious to find that a battery had been built on land that he owned at the mouth of the River Yealm in Devon, and wrote to the Secretary of War, Lord Hobart. Perring was eventually pacified by many letters from John Graves Simcoe, who was in charge of the construction of the defences. With the threat of invasion by the French still present, Perring presented the colours of the Corporation of London to the ten regiments of the London Loyal Infantry who assembled at Blackheath on 18 May 1804. Perring was accompanied on the grand procession to Blackheath by the Earl of Harrington, Earl Amherst and Prince Frederick, Duke of York.
 Link Information: Sir John Silvester, 1st Baronet (7 September 1745 – 30 March 1822) Answer: 24
What is the age difference between the Recorder of London who referenced Napoleon and Napoleon Bonaparte?

Passage: Despite being forced to retire from pro boxing Díaz kept in shape by lifting weights at a local gym. The gym owner was impressed with Díaz physique and work ethics and recommended he become a luchador. Díaz was originally trained by Ray Carrasco and later also trained under Rogelio de la Paz, Genaro Contreas, Raul Rojas and Daniel García; the latter would later be famous under the name of "Huracán Ramírez". Díaz made his professional wrestling debut in 1954, using the ring name "El Pelón" (Spanish for "Baldy") Chato Díaz, then later on worked under names such as "Indio" Mendoza, El Rayo Rojo and El Hombre del Rayo Rojo. He also worked for a while as an enmascarado (masked) character called Gargantua between 1954 and 1955. In 1955 Díaz came up with the ring name "Ray Mendoza" after his mentor Ray Carrasco and his wife's maiden name Mendoza. As Mendoza he quickly forged a very effective Rudo character ("bad guy") by using well developed physique and charisma to create a ring character that the fans loved to hate. In 1956 Mendoza began working for Salvador Lutteroth's Empresa Mexicana de Lucha Libre (EMLL), the world's oldest and Mexico's largest wrestling promotion. He made his debut at EMLL's main arena Arena Coliseo in February, 1956 in a Battle Royal that also included EMLL headliners Gory Guerrero, El Santo, Cavernario Galindo, Blue Demon and Black Shadow, a match that immediately established him as someone who Lutteroth saw potential in. In EMLL Mendoza struck up a friendship with René Guajardo and Karloff Lagarde out of the ring and a "partnership in crime" in the ring as the three became one of the most hated trio in lucha libre at the time. The three drew full houses all over Mexico, setting box office record after box office record as they faced técnicos(good guys) such as El Santo, Rayo de Jalisco or Blue Demon. They also had a very financially successful feud with Los Espantos (Espanto I, Espanto II, and Espanto III) in what at the time was a rare rudo vs. rudo feud. Outside the ring Mendoza, Guajardo and Lagarde often spoke out on behalf of the wrestlers, demanding higher pay and better conditions, and since they were able to generate a lot of ticket sales EMLL officials listened to their demands.
 Link Information: Manuel Guajardo Mejorado (January 4, 1933 – May 11, 1992) Answer: Karloff Lagarde
Was Guajardo or Lagarde older when they joined EMLL?

Passage: Kracaw graduated from high school in 1915. In the same year, her family left Colorado and moved to Orland, California, since the lower elevation there was expected to benefit her father's health. However, her father suffered setbacks in his business, and facing both blindness and tuberculosis, he committed suicide in 1917. Kracaw enrolled at the University of California, Berkeley, in 1915. She considered majoring in economics and English literature before deciding on psychology. She made a number of lifelong friends during her undergraduate years, including Jean Macfarlane, whose interest in psychology drove Kracaw to select that discipline for her major. She graduated cum laude in 1921, and began graduate study at UC Berkeley. Her Master's thesis studied ten families in San Francisco that had been clients of a juvenile court. She volunteered as a probation officer, and was required to meet and report on the families she was studying. She would later write that she struggled to be objective in writing about these families. Kracaw received her Master's degree in clinical psychology in 1920.
 Link Information: 

San Francisco (, , ; ), officially City and County of San Francisco and colloquially known as SF, San Fran, or "The City", is the cultural, commercial, and financial center of Northern California. San Francisco is the 13th-most populous city in the United States, and the fourth-most populous in California, Answer: California

In which state did Kracaw conduct research for her Master's thesis?