user: Question: What is the group a winner for Modena?
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 "Group A Winner" FROM "Table" WHERE "Group B Winner" = 'Modena';