Context: In 1981, the MUSE system was demonstrated for the first time in the United States, using the same 5:3 aspect ratio as the Japanese system. Upon visiting a demonstration of MUSE in Washington, US President Ronald Reagan was impressed and officially declared it "a matter of national interest" to introduce HDTV to the US.

Question: When was the MUSE system demonstrated in the US first?
Answer: 1981

Question: What aspect ratio did the MUSE system use when demonstrated in 1981?
Answer: 5:3

Question: Which president declared it "a matter of national interest" to introduce HDTV to the US?
Answer: President Ronald Reagan

Question: Which system was demonstrated in the US for the first time in 1981?
Answer: MUSE

Question: Which system was demonstrated in Washington to President Ronald Reagan?
Answer: MUSE

Question:  When was the MUSE system demonstrated in the UK first?
Answer: Unanswerable

Question: What aspect ratio did the MUSE system use when demonstrated in 1988?
Answer: Unanswerable

Question: Which president declared it "a matter of national interest" to introduce SDTV to the US?
Answer: Unanswerable

Question: Which system was demonstrated in the UK for the first time in 1981?
Answer: Unanswerable

Question: Which system was demonstrated in Washington to President Bush?
Answer: Unanswerable