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: Reebok Women's Combed Cotton Long Sleeve V-Neck Tee
Product feature: 100% Combed Cotton Jersey, Rib knit collar, Logo embroidery at left chest, V-neck long sleeve tee, 6 oz fabric weight
Product brand: Reebok
Target attributes: Neckline
Answer: attribute: neckline
value: v-neck
source: product title
attribute: neckline
value: v-neck
source: product feature