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: Stacy Adams Men's Long Sleeve Standard Fit Dress Shirt with Hidden Buttons,Rosette,15.5 32/33
Product feature: 60% Cotton/40% Polyester, Imported, Machine Wash, Solid dress shirt with spread collar, concealed placket, and single-chest pocket, Long sleeves, Package Dimensions: 12.5 x 10.2 x 2.6 inches, Shipping Weight: 8.8 ounces, ASIN: B00M5AZPNA, Item model number: DSA0001RST15.5A, Date first listed on Amazon: September 30, 2014, Domestic Shipping: Item can be shipped within U.S., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: STACY ADAMS
Target attributes: Neckline
Answer: attribute: neckline
value: spread collar
source: product feature
attribute: neckline
value: dress shirt
source: product title