Problem: Text: According to Article II, Section 2, Clause I of the Constitution, the President of the United States is ''Commander in Chief of the Army and Navy of the United States, and of the Militia of the several States, when called into the actual Service of the United States.'' Since the National Security Act of 1947, this has been understood to mean all United States Armed Forces. U.S. ranks have their roots in British military traditions, with the President possessing ultimate authority, but no rank, maintaining a civilian status, other than the title of Commander in Chief. The exact degree of authority that the Constitution grants to the President as Commander in Chief has been the subject of much debate throughout history, with Congress at various times granting the President wide authority and at others attempting to restrict that authority.

Question: is the president the head of the military?
A: yes

Problem: Text: Apart from the 1972 Dolphins, three NFL teams have completed undefeated and untied regular seasons: the 1934 Chicago Bears, the 1942 Chicago Bears, and the 2007 New England Patriots.

Question: has there ever been an undefeated nba team?
A: yes

Problem: Text: The idea of designating specific military aircraft to transport the President arose in 1943, when officials of the United States Army Air Forces, the predecessor to the U.S. Air Force, became concerned over the reliance on commercial airlines to transport the president. A C-87 Liberator Express was reconfigured for use as the first dedicated VIP and presidential transport aircraft and named Guess Where II, but the Secret Service rejected it because of its safety record. A C-54 Skymaster was then converted for presidential use; this aircraft, dubbed the Sacred Cow, carried President Franklin D. Roosevelt to the Yalta Conference in February 1945 and was subsequently used for another two years by President Harry S. Truman.

Question: does each president get a new air force one?
A:
no