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: 72"(L) x 19.50"(H) Double Sided Aquarium Terrarium Background Decorations
Product description: The aquarium background is fit for most 16-18 inch tall aquariums. Suggestion: Measure your aquarium from the top of your substrate to the bottom lip of the aquarium frame to determine if the background is tall enough for use. Note: 1. Please allow a little size error due to manual measurement. 2. Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different.
Product feature: 2 Sided - one side shows black woods and the other show coral, Safe for your fish, non-toxic, Dimension : 72 inch (Length) x 19.50 inch (Height) or 182 cm. (L) x 49.50 cm. (H), Material: Plastic, Delivery time: By Airmail: Generally, delivery to USA takes about 12-21 days. (Please carefully check if the delivery period is acceptable before you make a purchase)
Product price: $18.50
Product brand: Karen Low
Target attributes: Type
Answer: attribute: type
value: background
source: product title
attribute: type
value: background
source: product description