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_49406 ( "State" text, "Type" text, "Name" text, "Title" text, "Royal house" text )

### Question ###
What is the royal house for Wu at the state of cai?

### Accurate SQL ###

SELECT "Royal house" FROM table_49406 WHERE "Name" = 'wu' AND "State" = 'cai'