v.v Yes.
Kiwi's got it! WTG
The story is that P1 is actually wondering if P2 is a spy, and therefore he begins to quote the American national anthem. He begins with the land of the free, home of the brave line. P2 obviously knows the home of the brave line, as most people would. P1 then begins a random, very obscure line that the almost every American wouldn't know, but a spy would because it was thought they would memorize the entire thing in case anyone questioned them. P2 obviously responded by finishing the line and yeah....