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: Chenille Linen 100% Egyptian Cotton 500 Thread Count 1 Piece Fitted Sheet ONLY Fit Upto 18" inches Deep Pocket (Queen, Ivory).
Product description: Redefine your everyday elegance with these luxuriously soft solid fitted. This 500 Thread Count is truly worthy of a classy and elegant look. These Bottom sheets are offered in subtle colors.
Product feature: 100% Egyptian Cotton, Package Contents 1-Piece Fitted / Bottom Sheet.WASH INSTRUCTIONS: Machine wash in cold water with similar colors. Tumble dry low. Do not bleach., Fits mattresses Upto 18 inches Deep Pocket With Elastic all Its Around, Even Fully Elasticized Fitted / Bottom Sheet guarantees a Secure Fit on Mattress., QUEEN SIZE :- 60 x 80 inch 1 Fitted sheet, 100% AUTHENTIC: Don't settle for less or imitations. Our premium ultra-soft sheets are distinctive in its unique strength and comfortability that will outlast and outperform others sheets! Our easy care sheets are machine washable and require no ironing. Machine wash and dries quick on tumble dry low., Product Features : 100% Egyptian Cotton 500 Thread Count with fine & super soft single ply fabric.Anti shearing weave improves durability and avoids piling.Colorfast, Eco friendly dyes. Wrinkle free, stain resistant, hypoallergenic, and resistant to dust mites.
Product price: $28.99
Product brand: Chenille Linen
Target attributes: Thread Count
Answer: attribute: thread count
value: 500 thread count
source: product title
attribute: thread count
value: 500 thread count
source: product feature
attribute: thread count
value: 500 thread count
source: product description