user: Question: What is the smallest rating with nightly rank smaller than 7, timeslot rank smaller than 5 and eposide after episode 6?
Columns: ['Episode', 'Rating', 'Share', 'Rating/share (18-49)', 'Rank (Timeslot)', 'Rank (Night)']
Types: ['real', 'real', 'real', 'text', 'real', 'real']
Sample row: [1.0, 3.9, 7.0, '2.6/8', 2.0, 5.0]
SQL:

assistant: SELECT MIN("Rating") FROM "Table" WHERE "Rank (Night)" < 7.0 AND "Rank (Timeslot)" < 5.0 AND "Episode" > 6.0;