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_19517621_3 (series__number INTEGER, written_by VARCHAR)
### Question:
What is the series number for the episode written by Kristen Dunphy and David Ogilvy?
### Answer:
SELECT MAX(series__number) FROM table_19517621_3 WHERE written_by = "Kristen Dunphy and David Ogilvy"