Background: Arthur Stanley Jefferson was born in his grandparents' house on 16 June 1890 at 3 Argyle Street, Ulverston, Lancashire in north west England. He had two brothers and a sister. His parents, Margaret (nee Metcalfe) and Arthur Jefferson, were both active in the theatre and always very busy. In his early years, the boy spent much time living with his maternal grandmother, Sarah Metcalfe.
Context: Laurel and Mae Charlotte Dahlberg never married, but lived together as common-law husband and wife from 1919 to 1925, before Dahlberg accepted a one-way ticket from Joe Rock to go back to her native Australia. In November 1937, Dahlberg was back in the USA and sued the now successful Stan Laurel for financial support. At the time, Laurel's second marriage was in the process of a divorce, with Dahlberg's legal suit adding to Laurel's woes. The matter was settled out of court. Dahlberg was described as a "relief project worker" by the court. Laurel had four wives and married one of them a second time after their divorce. Laurel married his first wife, Lois Neilson, on 13 August 1926. On 10 December 1927, during the early years of Laurel and Hardy's partnership, Laurel and Neilson had a baby daughter, also named Lois. In May 1930, their second child, a son named Stanley, was born two months premature and died after nine days. Stan's daughter Lois died on 27 July 2017, aged 89. Laurel and Neilson divorced in December 1934. In 1935, Laurel married Virginia Ruth Rogers (known as Ruth). In 1937, Laurel filed for divorce from Ruth, confessing that he was not over his ex-wife Lois, but Lois decided against a reconciliation. On New Year's Day 1938, Laurel married Vera Ivanova Shuvalova (known as Illeana), leading to an irate Ruth accusing Stan of bigamy, but their divorce had been finalised a couple of days before his new marriage. After a very volatile marriage to Illeana, during which Stan dug a grave with the intention of burying his wife in it, he and Illeana separated in 1939 and divorced in 1940, with Illeana surrendering all claim to the Laurel surname on 1 February 1940, in exchange for $6,500. In 1941, Laurel remarried Virginia Ruth Rogers, with Laurel and Ruth divorcing for the second time in early 1946. On 6 May 1946, Laurel married Ida Kitaeva Raphael, to whom he remained married until his death on 23 February 1965.
Question: Did he have any siblings?
Answer:

Background: Edward Sapir (; January 26, 1884 - February 4, 1939) was an American anthropologist-linguist, who is widely considered to be one of the most important figures in the early development of the discipline of linguistics. Sapir was born in German Pomerania; his parents emigrated to United States of America when he was a child. He studied Germanic linguistics at Columbia, where he came under the influence of Franz Boas who inspired him to work on Native American languages.
Context: Sapir's special focus among American languages was in the Athabaskan languages, a family which especially fascinated him. In a private letter, he wrote: "Dene is probably the son-of-a-bitchiest language in America to actually know...most fascinating of all languages ever invented." Sapir also studied the languages and cultures of Wishram Chinook, Navajo, Nootka, Colorado River Numic, Takelma, and Yana. His research on Southern Paiute, in collaboration with consultant Tony Tillohash, led to a 1933 article which would become influential in the characterization of the phoneme. Although noted for his work on American linguistics, Sapir wrote prolifically in linguistics in general. His book Language provides everything from a grammar-typological classification of languages (with examples ranging from Chinese to Nootka) to speculation on the phenomenon of language drift, and the arbitrariness of associations between language, race, and culture. Sapir was also a pioneer in Yiddish studies (his first language) in the United States (cf. Notes on Judeo-German phonology, 1915). Sapir was active in the international auxiliary language movement. In his paper "The Function of an International Auxiliary Language", he argued for the benefits of a regular grammar and advocated a critical focus on the fundamentals of language, unbiased by the idiosyncrasies of national languages, in the choice of an international auxiliary language. He was the first Research Director of the International Auxiliary Language Association (IALA), which presented the Interlingua conference in 1951. He directed the Association from 1930 to 1931, and was a member of its Consultative Counsel for Linguistic Research from 1927 to 1938. Sapir consulted with Alice Vanderbilt Morris to develop the research program of IALA.
Question: what languages did he study?
Answer:
Sapir's special focus among American languages was in the Athabaskan languages,