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

Input:
Product title: bulk buys Kole Imports OP533 Assorted Graduation Cards
Product description: Assorted graduation cards. This is manufactured in China. This is easy to use. This is highly durable. This are of high quality. This item is a great value.
Product feature: Graduation card English, This is easy to use, This is manufactured in China
Product brand: bulk buys
Target attributes: Quantity
Answer: attribute: quantity
value: None
source: None