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: Amscan Grad Cap Head Bopper with Marabou | Party Favor
Product description: Stand out from the graduation party crowd when you wear our Grad Cap Head bopper w/ Marabou. Perfectly completes your eye-catching party getup.
Product feature: 1 head bopper, Fun and wacky head accessory with a glittery graduation cap and a cutout that reads "Congrats! Grad!", Great to wear during graduation ceremonies and parties or put them on your party loot bags!, Match up with our other party accessories and decorations
Product price: $7.42
Product brand: Amscan
Target attributes: Special Occasion
Answer: attribute: special occasion
value: graduation
source: product feature
attribute: special occasion
value: graduation
source: product description
attribute: special occasion
value: grad
source: product title