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_50 (year_opened VARCHAR, state VARCHAR, capacity VARCHAR)
  ### Question:
  What was the year opened for North Carolina with a smaller than 21,500 capacity?
  ### Answer:
  SELECT year_opened FROM table_name_50 WHERE state = "north carolina" AND capacity < 21 OFFSET 500