When debra j. fisher & erica messer are the writers and the director is patrick norris what is the series number?
CREATE TABLE table_17467147_1 (
    series__number VARCHAR,
    directed_by VARCHAR,
    written_by VARCHAR
)
SELECT series__number FROM table_17467147_1 WHERE directed_by = "Patrick Norris" AND written_by = "Debra J. Fisher & Erica Messer"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: When debra j. fisher & erica messer are the writers and the director is patrick norris what is the series number? ### Input: CREATE TABLE table_17467147_1 (
    series__number VARCHAR,
    directed_by VARCHAR,
    written_by VARCHAR
) ### Response: SELECT series__number FROM table_17467147_1 WHERE directed_by = "Patrick Norris" AND written_by = "Debra J. Fisher & Erica Messer"