user: Question: How many episodes had rating/share (18-49) of 0.7/2 and a rating of 2.1?
Columns: ['Episode Number', 'Episode', 'Rating', 'Share', 'Rating/Share (18-49)', 'Viewers (millions)', 'Rank (Timeslot)', 'Rank (Night)']
Types: ['real', 'text', 'text', 'real', 'text', 'text', 'real', 'real']
Sample row: [1.0, '"And Jill Came Tumbling After"', '3.5', 6.0, '1.3/4', '5.17', 2.0, 3.0]
SQL:

assistant: SELECT COUNT("Episode Number") FROM "Table" WHERE "Rating/Share (18-49)" = '0.7/2' AND "Rating" = '2.1';