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_16494599_10 (nationality VARCHAR, player VARCHAR)
  ### Question:
  How many nationalities does athlete Casey Jacobsen have?
  ### Answer:
  SELECT COUNT(nationality) FROM table_16494599_10 WHERE player = "Casey Jacobsen"