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: Fashion Greek Theta Chi Twill Letter Long Sleeve Tee
Product description: Theta Chi Long Sleeve Tee with double layer tackle twill letters. Highest quality satin stitching!
Product feature: High Quality 4 Inch Double Layer Twill Letters With Satin Sitching, Lifetime Guarantee on the Twill Letters - They Will Never Come Off. Letters Are Not Embroidered Onto the Garment, 100% Heavyweight Cotton - Heather Colors Contain Some Polyester, Official Licensed Product - Royalties Help Support Your National Office, 30 Day Money Back Guarantee, Shipping Information: View shipping rates and policies, ASIN: B074ZQDRZ5, Item model number: TX_GI_2400_4ITL, Date first listed on Amazon: October 31, 2014, Average Customer Review: 5.0 out of 5 stars 2 customer reviews
Product price: $24.95 - $28.95
Product brand: Fashion Greek
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: long sleeve
source: product description
attribute: sleeve style
value: long sleeve
source: product title