Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_9637 ( "Morse Taper number" real, "Taper" text, "B (max)" real, "C (max)" real, "D (max)" real )

### 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?

### Accurate SQL ###

SELECT AVG("B (max)") FROM table_9637 WHERE "C (max)" > '156' AND "Taper" = '1:19.231' AND "D (max)" < '34.9'