user: Question: What was the lifespan of the Representative from the Republican Party during the years of 1953–1970?
Columns: ['Representative', 'Years', 'State', 'Party', 'Lifespan']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Mark Udall', '1999–2009', 'Colorado', 'Democratic', '1950–']
SQL:

assistant: SELECT "Lifespan" FROM "Table" WHERE "Party" = 'Republican' AND "Years" = '1953–1970';