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: KES A5061-BK-P5 BRASS Single Robe/Coat Hook Wall Mount 5 Pcs, Flat Black
Product description: SPECIFICATIONS -Material : Brass -Screw Material : Type 304 Stainless Steel -Finish : Flat Black -Installation Method : Wall-mounted Package Includes Hook Screws and anchors Buy from KES Type 304 Stainless Steel screw, rust-free V.S. Iron screw All brass construction, ensuring quality and longevity 15-days return guaranteed
Product feature: 5 Pcs, Industry leading finish, build to resist scraches, corrosion and tarnishing, All brass construction, ensuring quality and longevity, High quality wall anchors, Type 304 Stainless Steel screw, rust-free, Easy installation
Product brand: Kes
Target attributes: Installation
Answer: attribute: installation
value: screws
source: product description
attribute: installation
value: screw
source: product description
attribute: installation
value: screw
source: product feature