user: ### NOW ANSWER:
Question: Name the number of δs ‡ /cal mol −1 k −1 for butadiene being 1,2-dimethylene-cyclohexane
Columns: ['-Butadiene', '10 4 k /min −1 (30 °C) (± 1-2%) absolute', '10 4 k /min −1 (30 °C) (± 1-2%) relative', 'ΔH ‡ /kcal mol −1', 'ΔS ‡ /cal mol −1 K −1']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2-methyl', '1.83', '1.00', '14.9', '-15']
SQL:

assistant: SELECT COUNT("ΔS ‡ /cal mol −1 K −1") FROM "Table" WHERE "-Butadiene" = '1,2-dimethylene-cyclohexane';