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: Transformers Dark of the Moon Mechtech Human Alliance Major Tungsten and Thunderhead
Product description: Everything Thunderhead does, he does loud. As an artillery commander, he is an expert at raining down fire on enemies hundreds of miles away. His partnership with Major Tungsten is easy both of them are loud, and more than happy to drop a storm of explosive shells on the heads of unsuspecting Decepticons. With three modes to choose from, these heroic partners have many options against the Decepticon forces. Switch into vehicle mode, sit your Major Tungsten figure on top, and send them into battle. Or let your Major Tungsten figure take refuge behind his mechanical friend when hes in robot mode. You can even switch to weapon mode and add on any other Mechtech figure! (Sold separately.), Welcome to the incredible world of Transformers robots. It is a world of high technology, ancient history, and a battle that has spanned the entire galaxy and millions of years. Optimus Prime, leader of the heroic Autobots, battles the tyrant Megatron and his evil Decepticons for the fate of freedom across the universe. There's a Transformers figure for every kid or collector. From big converting figures to miniature battling robots, you can team up with Transformers toys to create your own incredible adventures. Whether you're defending Earth with the Autobots, or conquering space with the Decepticons, the action is up to you. Transformers is a world-famous entertainment brand with 30 years of history, blockbuster movies, hit television shows and countless novels and comic books. With Transformers toys, you can create your own chapters in this epic, ongoing story. Transformers and all related characters are trademarks of Hasbro.
Product feature: Robot action figure teams up with human ally to share skills for an unstoppable advance, Triple-change figure converts to vehicle mode or weapons mode and back with his ally riding on top or inside for the ultimate in team strategy, Set includes vehicle figure and human ally figure
Product brand: Transformers
Target attributes: Type
Answer: attribute: type
value: transformers
source: product brand
attribute: type
value: transformers
source: product description
attribute: type
value: robot
source: product description
attribute: type
value: robot
source: product feature
attribute: type
value: transformers
source: product title