Extract the answer to the question from the following context. Question: What is the main idea of the passage? Context: In the early hours of 7 December (Hawaiian time), Japan launched a major surprise carrier-based air strike on Pearl Harbor without explicit warning, which crippled the U.S. Pacific Fleet, leaving eight American battleships out of action, 188 American aircraft destroyed, and 2,403 American citizens dead. At the time of the attack, the U.S. was not officially at war anywhere in the world, which means that the people killed or property destroyed at Pearl Harbor by the Japanese attack had a non-combatant status.[nb 11] The Japanese had gambled that the United States, when faced with such a sudden and massive blow, would agree to a negotiated settlement and allow Japan free rein in Asia. This gamble did not pay off. American losses were less serious than initially thought: The American aircraft carriers, which would prove to be more important than battleships, were at sea, and vital naval infrastructure (fuel oil tanks, shipyard facilities, and a power station), submarine base, and signals intelligence units were unscathed. Japan's fallback strategy, relying on a war of attrition to make the U.S. come to terms, was beyond the IJN's capabilities.
Ans: At the time of the attack, the U.S. was not officially at war anywhere in the world, which means that the people killed or property destroyed at Pearl Harbor by the Japanese attack had a non-combatant status

Extract the answer to the question from the following context. Question: what is the third official mentioned? Context: The Riigikogu elects and appoints several high officials of the state, including the President of the Republic. In addition to that, the Riigikogu appoints, on the proposal of the President of Estonia, the Chairman of the National Court, the chairman of the board of the Bank of Estonia, the Auditor General, the Legal Chancellor and the Commander-in-Chief of the Defence Forces. A member of the Riigikogu has the right to demand explanations from the Government of the Republic and its members. This enables the members of the parliament to observe the activities of the executive power and the above-mentioned high officials of the state.
Ans: Chairman of the National Court

Extract the answer to the question from the following context. Question: The program was mainly done by who? Context: The 2014 Human Development Report by the United Nations Development Program was released on July 24, 2014, and calculates HDI values based on estimates for 2013. Below is the list of the "very high human development" countries:
Ans: Nations

Extract the answer to the question from the following context. Question: Which methodologies must be used? Context: After their adoption, treaties as well as their amendments have to follow the official legal procedures of the United Nations, as applied by the Office of Legal Affairs, including signature, ratification and entry into force.
Ans: official