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 singer (Citizenship VARCHAR, Birth_Year INTEGER)
  ### Question:
  Show the citizenship shared by singers with birth year before 1945 and after 1955.
  ### Answer:
  SELECT Citizenship FROM singer WHERE Birth_Year < 1945 INTERSECT SELECT Citizenship FROM singer WHERE Birth_Year > 1955