user: Question: What is the lowest Took Office, when Senator is eddie bernice johnson, and when District is greater than 23?
Columns: ['Senator', 'Party', 'District', 'Home Town', 'Took Office']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Bill Ratliff', 'Republican', 1.0, 'Mount Pleasant', 1989.0]
SQL:

assistant: SELECT MIN("Took Office") FROM "Table" WHERE "Senator" = 'eddie bernice johnson' AND "District" > 23.0;