user: Question: When the death is None what is the number of major hurricanes?
Columns: ['Year', 'Number of tropical storms', 'Number of hurricanes', 'Number of major hurricanes', 'Deaths', 'Strongest storm']
Types: ['real', 'real', 'real', 'real', 'text', 'text']
Sample row: [1860.0, 1.0, 5.0, 1.0, '60+', 'One']
SQL:

assistant: SELECT "Number of major hurricanes" FROM "Table" WHERE "Deaths" = 'None';