text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_27877656_7 (surface VARCHAR, score VARCHAR, edition VARCHAR)
  ### Question:
  For edition is 2011 europe/africa group iiib and surface where score is 6–4, 6–1 please specify all the surface
  ### Answer:
  SELECT surface FROM table_27877656_7 WHERE score = "6–4, 6–1" AND edition = "2011 Europe/Africa Group IIIB"