user: Question: What is the greatest total when the last was September 1970?
Columns: ['Name', 'Total', 'First', 'Last', 'Highest rank']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Kotonishiki', 34.0, 'September 1990', 'September 1999', 'Sekiwake']
SQL:

assistant: SELECT MAX("Total") FROM "Table" WHERE "Last" = 'September 1970';