Assertion: royal ballet | /r/HasProperty | american ballet theatre
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text: Soon ballet spread around the world with the formation of new companies, including London's The Royal Ballet (1931), the San Francisco Ballet (1933), American Ballet Theatre (1937), the Royal Winnipeg Ballet (1939), The Australian Ballet (1940), the New York City Ballet (1948), the National Ballet of Canada (1951), and the National Ballet Academy and Trust of India (2002).