what is the gender of Ron Gray, ranked 5th?
CREATE TABLE table_66991 (
    "Riding" text,
    "Candidate's Name" text,
    "Gender" text,
    "Residence" text,
    "Occupation" text,
    "Votes" real,
    "Rank" text
)
SELECT "Gender" FROM table_66991 WHERE "Rank" = '5th' AND "Candidate's Name" = 'ron gray'
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 gender of Ron Gray, ranked 5th? ### Input: CREATE TABLE table_66991 (
    "Riding" text,
    "Candidate's Name" text,
    "Gender" text,
    "Residence" text,
    "Occupation" text,
    "Votes" real,
    "Rank" text
) ### Response: SELECT "Gender" FROM table_66991 WHERE "Rank" = '5th' AND "Candidate's Name" = 'ron gray'