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_77931 ( "String" text, "Scientific pitch" text, "Helmholtz pitch" text, "Interval from middle C" text, "Frequency ( Hz )" real )

### Question ###
What is the scientific pitch when the Helmholtz pitch is D?

### Accurate SQL ###

SELECT "Scientific pitch" FROM table_77931 WHERE "Helmholtz pitch" = 'd'