Input: Article: Bohr also introduced the quantity , now known as the reduced Planck constant, as the quantum of angular momentum. At first, Bohr thought that this was the angular momentum of each electron in an atom: this proved incorrect and, despite developments by Sommerfeld and others, an accurate description of the electron angular momentum proved beyond the Bohr model. The correct quantization rules for electrons in which the energy reduces to the Bohr model equation in the case of the hydrogen atom were given by Heisenberg's matrix mechanics in 1925 and the Schrodinger wave equation in 1926: the reduced Planck constant remains the fundamental quantum of angular momentum. In modern terms, if J is the total angular momentum of a system with rotational invariance, and Jz the angular momentum measured along any given direction, these quantities can only take on the values

Now answer this question: Who helped to give the correct quantization rules for electrons in 1926?

Output: Schrodinger

Input: Article: In a speech on 24 November 1992, to mark the 40th anniversary of her accession, Elizabeth called 1992 her annus horribilis, meaning horrible year. In March, her second son, Prince Andrew, Duke of York, and his wife, Sarah, separated; in April, her daughter, Princess Anne, divorced Captain Mark Phillips; during a state visit to Germany in October, angry demonstrators in Dresden threw eggs at her; and, in November, a large fire broke out at Windsor Castle, one of her official residences. The monarchy came under increased criticism and public scrutiny. In an unusually personal speech, the Queen said that any institution must expect criticism, but suggested it be done with "a touch of humour, gentleness and understanding". Two days later, the Prime Minister, John Major, announced reforms to the royal finances planned since the previous year, including the Queen paying income tax from 1993 onwards, and a reduction in the civil list. In December, Prince Charles and his wife, Diana, formally separated. The year ended with a lawsuit as the Queen sued The Sun newspaper for breach of copyright when it published the text of her annual Christmas message two days before it was broadcast. The newspaper was forced to pay her legal fees and donated 200,000 to charity.

Now answer this question: Who did Princess Anne divorce in April?

Output: Captain Mark Phillips

Input: Article: The term "high fidelity" was coined in the 1920s by some manufacturers of radio receivers and phonographs to differentiate their better-sounding products claimed as providing "perfect" sound reproduction. The term began to be used by some audio engineers and consumers through the 1930s and 1940s. After 1949 a variety of improvements in recording and playback technologies, especially stereo recordings, which became widely available in 1958, gave a boost to the "hi-fi" classification of products, leading to sales of individual components for the home such as amplifiers, loudspeakers, phonographs, and tape players. High Fidelity and Audio were two magazines that hi-fi consumers and engineers could read for reviews of playback equipment and recordings.

Now answer this question: What term was coined to differentiate better sounding products in the 1920s?

Output:
high fidelity