Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Smart/Tangoes USA MetroVille
Product description: SG 320US Features: -Game card.-Easy to expert.-Board features storage space for the challenge cards, rules and solutions.-Ideal for travel game.-Ages: 6 +. Specifications: -64 riveting challenges., From SmartGames, the worldwide leader in single player puzzle games, comes Metroville. Re-arrange the rotating tracks to find the correct path through your subway. Flex your logic muscles with this beautifully designed 3-D puzzle and explore all eight cities! With simple challenges for beginning passengers to complex puzzles that will challenge an experienced urban adventurer, Metroville is a fun way to develop logical thinking skills and spatial reasoning abilities.
Product feature: A fun, unique twist on puzzle gamesnavigate subways!, Made from high quality materials, 64 Challenges, including Starter, Junior, Expert and Master levels, Early challenges are great for beginners, Helps develop logic and spatial reasoning skills
Product brand: SmartGames
Target attributes: Battery Type
Answer: attribute: battery type
value: None
source: None