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: Suncast Free-Standing White Vinyl Pergola, 14 by 20-Feet
Product description: The white vinyl free-standing pergola features round tapered columns, an overhead structure with three layers, providing an ideal balance of shade and sun and many trim details. The internal wood components in the beams and rafters, anchor brackets and hardware ensure that the pergola no only looks great, but is engineered to handle all types of weather conditions.
Product feature: Low maintenance, will not rust, rot or crack; joint connectors, rigid vinyl beams and rafters reinforced with wood to provide strength and stability, Easy to assemble, no cutting necessary; step-by-step instructions and hardware are included, Pergola includes anchor brackets rated to withstand winds up to 90 MPH; optional brackets for winds up to 150 MPH available (part No.RHWB)
Product brand: Suncast
Target attributes: Type
Answer: attribute: type
value: pergola
source: product title
attribute: type
value: pergola
source: product description
attribute: type
value: pergola
source: product feature