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_27 ( buechel_ VARCHAR, _manhart_spelling__pronunciation_ VARCHAR, dakota_mission VARCHAR, deloria_ VARCHAR, _boas VARCHAR )

### Question ###
Deloria & Boas of , and a Dakota Mission of un had what Buechel & Manhart spelling (pronunciation)?

### Accurate SQL ###

SELECT buechel_ & _manhart_spelling__pronunciation_ FROM table_name_27 WHERE deloria_ & _boas = "ų" AND dakota_mission = "un"