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: WINSON Velvet Elegant Gorgeous Women Long Sleeve High waist Maxi Party Ball Dress S-3XL
Product feature: Shipping Information: View shipping rates and policies, ASIN: B0175YX8JS, Item model number: 1174S0841, Date first listed on Amazon: November 22, 2016, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product price: $19.10
Product brand: Winson
Target attributes: Length
Answer: attribute: length
value: maxi
source: product title