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_27877656_7 ( opponent_team VARCHAR, opponent VARCHAR, edition VARCHAR, outcome VARCHAR )

### Question ###
For opponent is sandra kristj nsd ttir, outcome is winner and edition is 2009 europe/africa group iiib mention all the opponent team.

### Accurate SQL ###

SELECT opponent_team FROM table_27877656_7 WHERE edition = "2009 Europe/Africa Group IIIB" AND outcome = "Winner" AND opponent = "Sandra Kristjánsdóttir"