user: Question: What is the value for internal floppy disk with s-100 slots greater than 8 introduced earlier than 1978?
Columns: ['System', 'Year Introduced', 'S-100 slots', 'Internal Floppy Disk', 'Internal Hard Disk']
Types: ['text', 'real', 'real', 'text', 'text']
Sample row: ['Z-1', 1976.0, 21.0, 'n/a', 'n/a']
SQL:

assistant: SELECT "Internal Floppy Disk" FROM "Table" WHERE "S-100 slots" > 8.0 AND "Year Introduced" < 1978.0;