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_20174050_23 ( notes VARCHAR, reader VARCHAR )

### Question ###
how many notes were read by reader varma, idria indira varma?

### Accurate SQL ###

SELECT COUNT(notes) FROM table_20174050_23 WHERE reader = "Varma, Idria Indira Varma"