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: 200 Thread Count Fitted Bed Sheet - Twin - Ikat Diamond
Product description: 1 Twin Fitted Sheet 200 Thread Count. Easy Care, Cotton Rich for extra softness. 39 inch X 75 inch (99 cm x 191 cm) 60% Cotton, 40 % Polyester. Fits Mattress up to 14 inches (35.6 cm) deep. Machine Wash Warm with Like Colors, Do Not Bleach, Tumble Dry.
Product feature: 60% cotton, Imported, Twin: 39" x 75" with 11" pocket, 60% cotton, 40% polyester, Machine Wash warm, no bleach, tumble dry low, Ring spun yarns for extra softness
Product brand: Mainstay
Target attributes: Thread Count
Answer: attribute: thread count
value: 200 thread count
source: product description
attribute: thread count
value: 200 thread count
source: product title