Question: When did color tv come out what year?
qaPairs: question: When did color tv come out for public demonstration in a public building what year?
answer: 1950
question: When did color tv come out for retail purchase what year?
answer: 1951
question: When did the first practical demo of a mechanically-scanned color tv come out what year?
answer: 1928
question: When did the first practical demo of a fully electronic color tv come out what year?
answer: 1944