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_4 (date VARCHAR, venue VARCHAR, competition VARCHAR, score VARCHAR)
  ### Question:
  When did a Competition of friendly, and a Score of 2–1, and a Venue of philadelphia , pennsylvania occur?
  ### Answer:
  SELECT date FROM table_name_4 WHERE competition = "friendly" AND score = "2–1" AND venue = "philadelphia , pennsylvania"