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_name_90 ( year VARCHAR, nominee VARCHAR, category VARCHAR )

### Question ###
Which Year has a Nominee of stephen sondheim, and a Category of the best original score?

### Accurate SQL ###

SELECT year FROM table_name_90 WHERE nominee = "stephen sondheim" AND category = "best original score"