Table schema:
CREATE TABLE table_27877656_7 (opponent_team VARCHAR, opponent VARCHAR, edition VARCHAR, outcome VARCHAR)

Question: For opponent is sandra kristjánsdóttir, outcome is winner and edition is 2009 europe/africa group iiib mention all the opponent team.
SQL: SELECT opponent_team FROM table_27877656_7 WHERE edition = "2009 Europe/Africa Group IIIB" AND outcome = "Winner" AND opponent = "Sandra Kristjánsdóttir"