Who was the womens singles winnerwhen the mens doubles were  stefan karlsson claes nordin , bk aura gbk?
CREATE TABLE table_12266757_1 (womens_singles VARCHAR, mens_doubles VARCHAR)
SELECT womens_singles FROM table_12266757_1 WHERE mens_doubles = "Stefan Karlsson Claes Nordin , BK Aura GBK"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_12266757_1 (womens_singles VARCHAR, mens_doubles VARCHAR) Question: Who was the womens singles winnerwhen the mens doubles were  stefan karlsson claes nordin , bk aura gbk? [/INST] SELECT womens_singles FROM table_12266757_1 WHERE mens_doubles = "Stefan Karlsson Claes Nordin , BK Aura GBK" </s>