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_52 (year INTEGER, league VARCHAR)
  ### Question:
  What was the earliest year for the USISL Pro League?
  ### Answer:
  SELECT MIN(year) FROM table_name_52 WHERE league = "usisl pro league"