user: Question: In which year did the Voice of Muscatine show start?
Columns: ['Freq', 'Call', 'City', 'Owner', 'Start', 'Day Power ( W )', 'Night Power', 'Nickname', 'Format', 'Stereo']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real', 'text', 'text', 'text']
Sample row: [860.0, 'KWPC', 'Muscatine', 'Prairie Radio Communications', 1947.0, 250.0, 8.0, 'Voice of Muscatine', 'Soft Oldies', 'No']
SQL:

assistant: SELECT "Start" FROM "Table" WHERE "Nickname" = 'Voice of Muscatine';