user: Question: What is John Shadegg's First Elected date?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Results']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Arizona 1', 'Rick Renzi', 'Republican', 2002.0, 'Re-elected']
SQL:

assistant: SELECT "First elected" FROM "Table" WHERE "Incumbent" = 'John Shadegg';