Why did Mary Jane Grey become queen in 1937?

Mary Jane Grey did not become queen in 1937; it seems there may be some confusion. In fact, Mary I of England, also known as Mary Tudor, reigned from 1553 to 1558, while the queen in 1937 was Elizabeth II, who ascended to the throne in 1952. If you meant a different historical figure or event, please provide more context for clarification.