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: Royal Canin Size Health Nutrition Giant Adult Dry Dog Food
Product description: The sheer size of the extra-large dog commands a presence. But did you know that the giant dog is also at a higher risk of bone and joint issues and frequently suffer from digestive upset?Giantdry dog food formulas have the proper level of calcium, plus includes glucosamine, chondroitin and EPA/DHA for joint health. To help ease digestive upset,Giantformulas include highly digestible proteins and the proper blend of fermentable and non-fermentable fibers.
Product feature: Helps Support Giant Breed Dogs Healthy Bones And Joints Which Can Be Placed Under Stress By Body Weight., Contains An Exclusive Complex Of Antioxidants To Help Support Cellular Health., Combination Of Nutrients (Including Taurine) To Help Support A Healthy Heart., Helps Promote Good Digestibility With An Exclusive Formula Including Very High Quality Protein And A Balanced Supply Of Dietary Fiber., For giant breed puppies over 18/24 months old, Adult target weight: over 100 lb
Product price: $56.69
Product brand: Royal Canin
Target attributes: Life Stage
Answer: attribute: life stage
value: adult
source: product feature
attribute: life stage
value: adult
source: product title