What is the average Height when the weight is less than 91 and the position is d, and a Birthdate of july 4, 1975?
CREATE TABLE table_6842 (
    "Position" text,
    "Name" text,
    "Height (cm)" real,
    "Weight (kg)" real,
    "Birthdate" text,
    "Birthplace" text,
    "1997\u20131998 Team" text
)
SELECT AVG("Height (cm)") FROM table_6842 WHERE "Weight (kg)" < '91' AND "Position" = 'd' AND "Birthdate" = 'july 4, 1975'
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: What is the average Height when the weight is less than 91 and the position is d, and a Birthdate of july 4, 1975? ### Input: CREATE TABLE table_6842 (
    "Position" text,
    "Name" text,
    "Height (cm)" real,
    "Weight (kg)" real,
    "Birthdate" text,
    "Birthplace" text,
    "1997\u20131998 Team" text
) ### Response: SELECT AVG("Height (cm)") FROM table_6842 WHERE "Weight (kg)" < '91' AND "Position" = 'd' AND "Birthdate" = 'july 4, 1975'