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: Star K Sterling Silver Round Stone Heart Pendant
Product description: The impressing Original Star K Round Stone Heart Pendant, crafted in 925 Sterling Silver. This amazing design is mounted with 1 stone prong set Round stone clean clarity, 10 stones prong set colorless Round Cubic Zirconia. This style measures 18.00 mm wide, 22.00 mm long.18 inches chain includedDesigner: Star K - This beautiful design, is part of the exclusive Star K. jewelry collection. Star K. designs are copyrighted, so please be aware of cheap imitations selling online. Only original Star K. creations are made using the highest quality materials and craftsmanship, backed by an exclusive Lifetime Warranty. Warranty: - This item is covered by our exclusive Silver Shield Lifetime Warranty. This exclusive lifetime coverage is offered ONLY by us so please shop with confidence, our quality is guaranteed for life!
Product feature: Metal: 925 Sterling Silver. Dimensions: Width: 12.00 mm Length: 28.00 mm, This beautiful design is part of the exclusive Star K. Jewelry collection. Star K, is a reputable American Family Business based in New York since 1986, uses only the highest quality materials, and will proudly stand behind all of her products., Blue Created Opal: The Alternate Created Birthstone for October. From the Greek `opallios`, meaning `colour change`. A symbol of hope and faithfulness for the rainbow locked within it, it inspires true love and brings confidence., 18 inch Chain in a matching metal will be included, Additional Stones: (cubic-zirconia, Shape: round-shape, Color: Colorless.), Package Dimensions: 5.7 x 4.6 x 1.9 inches, Shipping Weight: 3.2 ounces ( View shipping rates and policies ), ASIN: B00G08BFFK, Item model number: 309174, Date first listed on Amazon: July 16, 2018, Average Customer Review: 4.5 out of 5 stars 2 customer reviews
Product price: $39.99
Target attributes: Shape
Answer: attribute: shape
value: heart
source: product title
attribute: shape
value: heart
source: product description