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: Apple iPod Touch, 64GB, Pink (6th Generation)
Product description: IPod touch is the perfect way to carry your music collection in your pocket. With the iTunes store -the worlds largest music catalog -you can load up your iPod touch with your favorite songs. And thanks to iCloud, everything you purchase through the iTunes store is automatically available on all your devices for free.
Product feature: iPod touch features an apple-designed A8 chip built on 64-bit architecture., The M8 motion coprocessor continually measures physical motion from advanced sensors, including a gyroscope and accelerometer., iPod touch has a 4-inch retina display, so all your fun has a beautiful canvas.
Product brand: Apple
Target attributes: Weight
Answer: attribute: weight
value: None
source: None