The ship was launched in April 1953, when Elizabeth II was in the first few months of her reign.
When Elizabeth II was in the first few months of her reign in April 1953, the ship was launched.
mnli hypothesis: When Elizabeth II was in the first few months of her reign in April 1953, the ship was launched. premise: The ship was launched in April 1953, when Elizabeth II was in the first few months of her reign.