Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Tcombo Big Chinese Flag - China Men's V-neck T-Shirt Tee
Product description: Perfect to wear at home or out on the town. The garment is Fully Machine Washable.
Product feature: 100% PreShrunk Cotton for a Cool Comfortable Fit, Design on the Back of The Garment, Fully Machine Washable, Shipping Information: View shipping rates and policies, ASIN: B01GKDET70, Date first listed on Amazon: April 4, 2016, Average Customer Review: 4.0 out of 5 stars 1 customer review
Product price: $10.95
Product brand: Tcombo
Target attributes: Shoulder Style
Answer: attribute: shoulder style
value: None
source: None