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_1307572_1 (composition VARCHAR, edge VARCHAR)
  ### Question:
  What material is made with a rounded, plain edge?
  ### Answer:
  SELECT composition FROM table_1307572_1 WHERE edge = "Rounded, plain"