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 city (gdp VARCHAR, Regional_Population VARCHAR)
  ### Question:
  what is the GDP of the city with the largest population.
  ### Answer:
  SELECT gdp FROM city ORDER BY Regional_Population DESC LIMIT 1