Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: 1891 by SFERRA Stoneleigh Cotton 4-Piece California King Sheet Set, Apple
Product description: Uniquely interesting. Mini pen-and-ink style scenes of trees and peacocks strutting amid tall grasses are depicted on these ultra-smooth cotton sateen sheets. Each vignette is bordered with a light green scrolled pattern, as if each one was the work of an old master. Fitted sheets are overcut to fit modern mattresses, and have elastic on all sides to make bed-dressing easy and smooth.
Product feature: 100% Printed Cotton Sateen, Imported, Machine wash cold, gentle cycle with non-chlorine bleach detergent wash dark colors separately tumble dry on low heat For best results, iron on cotton setting to regain luster and sheen, Imported, 100-Percent printed cotton sateen, 4-Piece set: 1-flat sheet 108 by 114-inch; 1-fitted sheet 72 by 84 by 17-inch; 2-king cases 22 by 42-inch, Apple
Product brand: Sferra
Target attributes: Thread Count
Answer: attribute: thread count
value: None
source: None