Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Rawlings Official Yankee Stadium 2008 Final Season Baseball New
Product description: The same Rawlings baseball used in games in the final season Yankee Stadium 2008.Has the final season stamp brand new in the Rawlings box.
Product feature: Official MLB baseball, Same one used in games final season 2008, Yankee Stadium final season stamp, Made by Rawlings
Product brand: Rawlings
Target attributes: Quantity
Answer: attribute: quantity
value: None
source: None