Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: ColorfulHall Modern Art Style Free Design 24 pcs Circles DIY Acrylic 3d Mirror Wall Decal
Product description: Notice: This is DIY product,according renderings (or your own ideas), paste in your favorite place. Package Include: 1pcs x mirror sticker Our decal stickers are made from the best acrylic in the industry. They can last for many years without peeling or fading. Our decal stickers are no harm to the environment and health. Installation prompt: 1. Please keep the wall clean before pasting. 2.First according to the template on the ground, put the product well. 3.Suggst to take a small piece of component test whether suitable for metope. 4.This product can be used again and again, please use another binding to cooperate when you use again. 5. Press firmly to squeeze out any air bubbles. Don't: Ash surface, Broken surface,uneven surface Do: Clean smooth wall,tiles,windows,smooth wallpaper,closets,plastic.
Product feature: Please noticed all of our products has the special packaing and logo, Metal shiny surface like mirror, There is a protective film on the mirror sticker. Once finished, please tear off the protect film, Easily removable without damaging your wall, Easy to paste the decal without any messy paint and brushes
Product brand: ColorfulHall
Target attributes: Placement
Answer: attribute: placement
value: wall decal
source: product title
attribute: placement
value: wall
source: product description
attribute: placement
value: wall
source: product feature