Complete the title of John Keats' 1819 ballad: "La Belle Dame sans ___."

In 1858, after the Indian Rebellion, the British Crown took over the governing of India from which company? British officers in India took up which mounted sport around 1860, soon bringing it back to England? Which title heroine of an 1877 Tolstoy novel has a tragic love affair with Count Vronsky? Which Cleveland businessman founded Standard Oil in 1870 and retired from active management in the 1890s? In a famous 1936-37 sit-down strike in Flint, Michigan, the United Auto Workers took on which company? Norse settlers began arriving around 874 on which North Atlantic island, which founded its Althing parliament in 930? Dutch elm disease devastated which North American tree, once a favorite for lining city streets? While living in the U.S., which scientist was offered the presidency of Israel in 1952?