In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Example Input: Pelycosaurs are a paraphyletic group of _ primitive families of synapsids.
Example Output: six

Example Input: Autism is _ to four times more likely to affect boys than girls.
Example Output: three

Example Input: Black women die from cervical cancer at _ times the rate of white women.
Example Output:
three