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_23287683_1 ( title VARCHAR, directed_by VARCHAR )

### Question ###
How many episodes were directed by Sarah Pia Anderson?

### Accurate SQL ###

SELECT COUNT(title) FROM table_23287683_1 WHERE directed_by = "Sarah Pia Anderson"