Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: 50 Autism Awareness Latex Balloons (1 Pack - 50 Balloons)
Product description: These 10 inch autism awareness balloons are perfect for your event to show excitement and awareness. Each yellow latex balloon has a blue puzzle piece and the words, "Autism Awareness". You get one package of 50 balloons per pack.
Product feature: Autism Awareness Balloons (50 Balloons), Reads: "Autism Awareness", Yellow balloon w/ blue autism puzzle piece, 10 inch latex balloons, One package of 50 balloons
Product price: $15.00
Product brand: Fundraising For A Cause
Target attributes: Quantity
Answer: attribute: quantity
value: 50 balloons
source: product title
attribute: quantity
value: 50 balloons
source: product feature
attribute: quantity
value: package of 50 balloons
source: product description