[Q]: This article: At Birmingham, Oliphant's team had reached a different conclusion. Oliphant had delegated the task to two German refugee scientists, Rudolf Peierls and Otto Frisch, who could not work on Oliphant's radar project because they were enemy aliens and therefore lacked the necessary security clearance. Francis Perrin had calculated the critical mass of uranium to be about 40 tonnes (39 long tons; 44 short tons). He reckoned that if a neutron reflector were placed around it, this might be reduced to 12 tonnes (12 long tons; 13 short tons). Peierls attempted to simplify the problem by using the fast neutrons produced by fission, thus omitting consideration of moderator. He too calculated the critical mass of a sphere of uranium in a theoretical paper written in 1939 to be "of the order of tons".Peierls knew the importance of the size of the critical mass that would allow a chain reaction to take place and its practical significance. In the interior of a critical mass sphere, neutrons are spontaneously produced by the fissionable material. A very small portion of these neutrons are colliding with other nuclei, while a larger portion of the neutrons are escaping through the surface of the sphere. Peierls calculated the equilibrium of the system, where the number of neutrons being produced equalled the number escaping.Niels Bohr had theorised that the rare uranium-235 isotope, which makes up only about 0.7% of natural uranium, was primarily responsible for fission with fast neutrons, although this was not yet universally accepted. Frisch and Peierls were thus able to revise their initial estimate of critical mass needed for nuclear fission in uranium to be substantially less than previously assumed. They estimated a metallic sphere of uranium-235 with a radius of 2.1 centimetres (0.83 in) could suffice. This amount represented approximately 1 kilogram (2.2 lb) of uranium-235. These results led to the FrischPeierls memorandum, which was the initial step in the development of the nuclear arms programme in Britain. This... contains an answer for the question: What were the full names of the two people who calculated the critical mass of uranium?, what is it ?
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[A]: Rudolf Peierls

input: Please answer the following: This article: The one-act opera genre had become increasingly popular in Italy following the 1890 competition sponsored by publisher Edoardo Sonzogno for the best such work, which was won by the young Pietro Mascagni's Cavalleria rusticana. With Tosca essentially completed by November 1899, Puccini sought a new project. Among sources he considered, before proceeding with Madama Butterfly, were three works by French dramatist Alphonse Daudet that Puccini thought might be made into a trilogy of one-act operas.After Butterfly premiered in 1904, Puccini again had difficulty finding a new subject. He further considered the idea of composing three one-act operas to be performed together, but found his publisher, Giulio Ricordi, firmly opposed to such a project, convinced that it would be expensive to cast and produce. The composer then planned to work with his longtime librettist, Giuseppe Giacosa, on an opera about Marie Antoinette, a project frustrated by the librettist's illness. Puccini wrote in November 1905, "Will we go back to it? [Maria Antonietta] If I find three one-act works that suit me, I'll put off M.A." Puccini pursued neither project, as Giacosa's illness led to his death in September 1906.In March 1907, Puccini wrote to Carlo Clausetti, Ricordi's representative in Naples, proposing three one-act operas based on scenes from stories by Russian novelist Maxim Gorky. By May the composer had set aside this proposal to concentrate on the project which became La fanciulla del West, although he did not wholly abandon the idea of a multiple-opera evening. His next idea in this vein, some years later, was for a two-opera bill, one tragic and one comic; he later expanded this to include a third opera with a mystic or religious tone. By November 1916 Puccini had completed the "tragic" element, which became Il tabarro, but he still lacked ideas for the other two works. He considered staging Il tabarro in combination with his own early work Le Villi, or with other two-act operas which might be used to round out the evening's... contains an answer for the question: What is the last name of the person who planned to work with his longtime librettist?, what is it ?
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output: Puccini

Problem: This article: Bellette and Haefliger returned to Australia just before the outbreak of World War II. Shortly after her arrival, Bellette held an exhibition at Sydney's Macquarie Galleries. The couple became influential members of the Sydney Art Group, a network of "fashionable" moderns whose membership included William Dobell and Russell Drysdale. Bellette painted and held regular shows "a solo show every second year and a group show every year at the Macquarie Galleries". Her husband served as art critic for The Sydney Morning Herald for a decade and a half.In 1942, Bellette won the Sir John Sulman Prize with For Whom the Bell Tolls. She won it again in 1944 with her painting Iphigenia in Tauris, inspired by Euripides' play. The composition is set in a dry, open landscape, with several riders on horses whose appearance suggests "the Australian present, rather than Greek antiquity". The judge awarding the prize actually preferred another of her entries, Electra, depicting the sister of Iphigenia also prominent in Greek tragedy but it failed to meet the size requirements. Both Iphigenia in Tauris and Electra were among the many works created by Bellette in the 1940s that were inspired by the tragedies of Euripides, Sophocles and Homer. Her choice of subject matter and approach placed her at odds with mainstream modernism, while she seemed to shun explicit links between the classical and the Australian. Bellette reasoned that she preferred to choose her palette and the spatial arrangements of her compositions to evoke a place's atmosphere. Critics identified the influence of European modernists Aristide Maillol and Giorgio de Chirico, as well as Italian Quattrocento painters Masaccio and Piero della Francesca, about some of whom Bellette wrote articles in the journal Art in Australia.The most distinctive feature of the artist's work was this choice of classical subjects. In 1946, Bellette's paintings were hung in at least four separate exhibitions. Reviewers commented on her synthesis of "the impulsiveness of romanticism... contains an answer for the question: Who created a textile design in 1947?, what is it ?

A:
Bellette