Question: Mary Young Pickersgill was the creator of the flag that flew during the battle in which the US and British forces met at what location?
Sentence (from "Mary Young Pickersgill"): The flag was installed in August 1813, and, a year later, during the Battle of Baltimore, Francis Scott Key could see the flag while negotiating a prisoner exchange aboard a British vessel, and was inspired to pen the words that became the United States National Anthem.
Relevant evidence: No