Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: CafePress Seinfeld: Mandelbaum's Gym Light Cotton T-Shirt
Product description: CafePress brings your passions to life with the perfect item for every occasion. With thousands of designs to choose from, you are certain to find the unique item you've been seeking. This standard fit short-sleeve t-shirt features a comfortable crew neck and quality construction, making it the perfect graphic tee gift for both men and women. The soft fabric looks as good as it feels, and this tee is durable for everyday wear. Our cute, funny, and unique designs are printed professionally, and make great novelty gifts for him or her, young or old. And with CafePress, your satisfaction is always our promise...buy with confidence, as we offer easy returns and exchanges and a 100% money back guarantee. CAFEPRESS DOES NOT OFFER PRODUCTS IN THE CATEGORIES OF ROBES, PAJAMAS OR LOUNGEWEAR INTENDED FOR USE BY INDIVIDUALS UNDER THE AGE OF 12. THIS PRODUCT IS NOT INTENDED FOR SUCH USE.
Product feature: These quality short-sleeve crew-neck t-shirts are 100% pre-shrunk cotton (cotton/polyester blend for gray colors) and are soft and durable for a comfortable feel. Fit is unisex standard (size up in doubt). S, M, L, XL, XLT, 2XL, 2XLT, 3XL, 3XLT available., Our graphic tee designs are professionally printed, so your unique design will look great and make someone smile with the funny, cute, vintage, or expressive artwork., Treat yourself, or make this t shirt the perfect gift for Mother's Day, Father's Day, Valentine's Day, Christmas, birthdays, anniversaries, retirement, or for no reason at all!, Machine wash cold inside out with like colors and tumble dry low for easy and convenient care. IMPORTED., We offer 100% money back guarantee, so you can buy with confidence. Your satisfaction is our promise, and returns/exchanges are made easy., Shipping Information: View shipping rates and policies, ASIN: B07BZTZBKQ, Date first listed on Amazon: June 13, 2011, Average Customer Review: 5.0 out of 5 stars 1 customer review
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: short-sleeve
source: product description
attribute: sleeve style
value: short-sleeve
source: product feature