user: Question: Which Year Start has a Number of 28?
Columns: ['Number', 'Year Start', 'Year End', 'Name', 'Home Club']
Types: ['real', 'real', 'real', 'text', 'text']
Sample row: [1.0, 1867.0, 1870.0, 'Bell, David', 'Caledonian']
SQL:

assistant: SELECT "Year Start" FROM "Table" WHERE "Number" = 28.0;