user: Question: What is the number of group b winner for Francavilla?
Columns: ['Season', 'Group A Winner', 'Group B Winner', 'Group C Winner', 'Group D Winner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1978–79', 'Sanremese', 'Cremapergo', 'Fano', 'Rende']
SQL:

assistant: SELECT COUNT("Group B Winner") FROM "Table" WHERE "Group C Winner" = 'Francavilla';