sentences:  He began medical school at the American University in Beirut in 1908 and settled in Palestine in 1910, during the Second Aliyah (1904–1914).Along with Eliezer Kaplan Sprinzak headed "Hapoel Hatzair" ("The Young Worker") a Zionist socialist faction formed in 1905 and one of the organisations that consolidated to form Mapai in 1930.Its members were pro-British and supported Chaim Weizmann.