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: Case De Andrea Milano 2-Piece Faux Linen Sectional Sofa with Reversible Chaise, Ash Black
Product description: 2 piece reversible sectional sofa, dark grey color with accent pillows. Faux linen sofa with reversible chaise. Built for style and comfort.
Product feature: 2 piece reversible microfiber sectional sofa, 3 seater with LR chaise, Fabric is designed for durability, seam strength, beauty and comfort, Chaise 33" L x 65.5" W x 35" H / Sofa 78" L x 33" W x 35" H / Assembled 111" L x 64.5"(C) W x 33"(S) W x 35" H, Assembly instructions and hardware included
Product brand: Case De Andrea Milano
Target attributes: Sleeper Size
Answer: attribute: sleeper size
value: None
source: None