user: Question: Which year has a Main of Eintracht Frankfurt and Hessen of FSV Mainz 05?
Columns: ['Year', 'Main', 'Hessen', 'Rhein', 'Saar']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1928.0, 'Eintracht Frankfurt', 'Wormatia Worms', 'Waldhof Mannheim', 'FV Saarbrücken']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Main" = 'Eintracht Frankfurt' AND "Hessen" = 'FSV Mainz 05';