user: Question: What is the B (max) average when the C (max) is greater than 156, the taper is 1:19.231, and the D (max) is less than 34.9?
Columns: ['Morse Taper number', 'Taper', 'B (max)', 'C (max)', 'D (max)']
Types: ['real', 'text', 'real', 'real', 'real']
Sample row: [0.0, '1:19.212', 56.5, 59.5, 10.5]
SQL:

assistant: SELECT AVG("B (max)") FROM "Table" WHERE "C (max)" > 156.0 AND "Taper" = '1:19.231' AND "D (max)" < 34.9;