Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Marvel Infinite Series Grey Beast Figure
Product description: Superhuman strength, ape-like agility, and a Ph.D. in Biochemistry. Hank McCoy is Beast! Start the battle of good versus evil with this incredible Beast figure! This mutant has the superhuman powers to overpower the foes of justice. Will he prevail in his quest to stop evildoers? It's all up to you - and Beast! Marvel products are produced by Hasbro under license from Marvel Characters B.V.
Product feature: This version of Beast is gray to represent the mutant super villain., Figure has powerful muscles., Collect them all (each sold separately)., Includes figure.
Product price: $11.51
Product brand: Marvel
Target attributes: Theme
Answer: attribute: theme
value: None
source: None