question: The first half of the 20th century was marked by what in Russia and the Soviet Union ?
answer: succession of wars , famines and other disasters
turker_answer: The first half of the 20th century was marked by a succession of wars , famines and other disasters in Russia and the Soviet Union .
rule-based: The first half of the 20th century was marked by succession of wars , famines and other disasters in Russia and the Soviet Union .