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_name_83 (years VARCHAR, nationality VARCHAR, position VARCHAR)
  ### Question:
  What is Years, when Nationality is United States, and when Position is PG / SG?
  ### Answer:
  SELECT years FROM table_name_83 WHERE nationality = "united states" AND position = "pg / sg"