Question: Who was the grandfather of the man confined to the American coastal pentagonal bastion fort known for its role in the War of 1812?
Sentence (from "Frank Key Howard"): Howard was initially confined to Fort McHenry, the same fort his grandfather Francis Scott Key saw withstand a British bombardment during the War of 1812, which inspired him to write The Star Spangled Banner, which would become the national anthem of the United States of America.
Relevant evidence: Yes