With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Einstein was stateless for around five years.
text_B: Albert Einstein -LRB- -LSB- ˈaɪnstaɪn -RSB- -LSB- ˈalbɛɐt ˈaɪnʃtaɪn -RSB- ; 14 March 1879 -- 18 April 1955 -RRB- was a German-born theoretical physicist .. theoretical physicist. theoretical physicist. He developed the theory of relativity , one of the two pillars of modern physics -LRB- alongside quantum mechanics -RRB- .. theory of relativity. theory of relativity. modern physics. modern physics. quantum mechanics. quantum mechanics. Einstein 's work is also known for its influence on the philosophy of science .. philosophy. philosophy. philosophy of science. philosophy of science. Einstein is best known by the general public for his mass -- energy equivalence formula -LRB- which has been dubbed `` the world 's most famous equation '' -RRB- .. He received the 1921 Nobel Prize in Physics `` for his services to theoretical physics , and especially for his discovery of the law of the photoelectric effect '' , a pivotal step in the evolution of quantum theory .. Physics. Physics. Nobel Prize in Physics. Nobel Prize in Physics. photoelectric effect. photoelectric effect. quantum theory. Introduction to quantum mechanics. Near the beginning of his career , Einstein thought that Newtonian mechanics was no longer enough to reconcile the laws of classical mechanics with the laws of the electromagnetic field .. Newtonian mechanics. Newtonian mechanics. classical mechanics. classical mechanics. electromagnetic field. electromagnetic field. This led him to develop his special theory of relativity during his time at the Swiss Patent Office in Bern -LRB- 1902 -- 1909 -RRB- , Switzerland .. Switzerland. Switzerland. Swiss Patent Office. Swiss Patent Office. Bern. Bern. theory of relativity. theory of relativity. special theory of relativity. special theory of relativity. He realized , however , that the principle of relativity could also be extended to gravitational fields , and with his subsequent theory of gravitation in 1916 , he published a paper on general relativity .. gravitational fields. gravitational fields. general relativity. general relativity. He continued to deal with problems of statistical mechanics and quantum theory , which led to his explanations of particle theory and the motion of molecules .. quantum theory. Introduction to quantum mechanics. statistical mechanics. statistical mechanics. particle. particle. motion of molecules. Brownian motion. He also investigated the thermal properties of light which laid the foundation of the photon theory of light .. photon. photon. In 1917 , Einstein applied the general theory of relativity to model the large-scale structure of the universe .. theory of relativity. theory of relativity. universe. universe. Between 1895 and 1914 he lived in Switzerland -LRB- except for one year in Prague , 1911 -- 12 -RRB- , where he received his academic diploma from the Swiss Federal Polytechnic in Zurich -LRB- later the Eidgenossische Technische Hochschule , ETH -RRB- in 1900 .. Switzerland. Switzerland. Swiss Federal Polytechnic. ETH Zurich. He later taught there at the same institute as a professor of theoretical physics between 1912 and 1914 before he left for Berlin .. In 1901 , after being stateless for more than five years , Einstein acquired Swiss citizenship , which he kept for the rest of his life .. Swiss citizenship. Swiss citizenship. In 1905 , Einstein was awarded a PhD by the University of Zurich .. University of Zurich. University of Zurich. The same year , his annus mirabilis -LRB- miracle year -RRB- , he published four groundbreaking papers , which were to bring him to the notice of the academic world , at the age of 26 .. annus mirabilis. annus mirabilis. four groundbreaking papers. Annus Mirabilis papers. He was visiting the United States when Adolf Hitler came to power in 1933 and , being Jewish , did not go back to Germany , where he had been a professor at the Berlin Academy of Sciences .. Adolf Hitler. Adolf Hitler. Jewish. Jewish people. Berlin Academy of Sciences. Prussian Academy of Sciences. He settled in the United States , becoming an American citizen in 1940 .. American citizen. American citizen. On the eve of World War II , he endorsed a letter to President Franklin D. Roosevelt alerting him to the potential development of `` extremely powerful bombs of a new type '' and recommending that the U.S. begin similar research .. World War II. World War II. letter to President Franklin D. Roosevelt. Einstein–Szilard letter. This eventually led to what would become the Manhattan Project .. Manhattan Project. Manhattan Project. Einstein supported defending the Allied forces , but generally denounced the idea of using the newly discovered nuclear fission as a weapon .. Allied forces. Allies of World War II. nuclear fission. nuclear fission. Later , with the British philosopher Bertrand Russell , Einstein signed the Russell -- Einstein Manifesto , which highlighted the danger of nuclear weapons .. Bertrand Russell. Bertrand Russell. Einstein was affiliated with the Institute for Advanced Study in Princeton , New Jersey , until his death in 1955 .. Institute for Advanced Study. Institute for Advanced Study. Einstein published more than 300 scientific papers along with over 150 non-scientific works .. more than 300 scientific papers. List of scientific publications by Albert Einstein. Einstein 's intellectual achievements and originality have made the word `` Einstein '' synonymous with `` genius '' .. genius. genius
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