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_2668336_19 (incumbent VARCHAR, candidates VARCHAR, result VARCHAR)
  ### Question:
  Who were the incumbent(s) in the election featuring  john murray (dr) 50.4% george denison (dr) 49.6% with a result of a retired democratic-republican hold?
  ### Answer:
  SELECT incumbent FROM table_2668336_19 WHERE candidates = "John Murray (DR) 50.4% George Denison (DR) 49.6%" AND result = "Retired Democratic-Republican hold"