user: Question: What are all the typhus number when smallpox is 4
Columns: ['Year', 'Typhus', 'Typhoid fever', 'Relapsing fever', 'Smallpox', 'Malaria']
Types: ['text', 'real', 'real', 'real', 'real', 'text']
Sample row: ['1913', 120.0, 424.0, 30.0, 67.0, '3600']
SQL:

assistant: SELECT "Typhus" FROM "Table" WHERE "Smallpox" = 4.0;