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: 925 Sterling Silver Double Sided Crystal Balls Stud Earrings
Product description: Feature Material:925 sterling silver with crystal Type: Silver double sided crystal balls stud earrings NetWeight:about2.0grams Package:1SetWithProtectiveVelvetBag Placeoforigin:China(Mainland) Function:Nickelfree&resistanceagainstwear&tear Occasion:Dancingparty,Travelmemorial,Businessgifts,Fair,Openingceremony,Promotionaladvertising,Lovepresents,Anniversarycelebrationetc. JewelrymaintenanceandPrecautions 1.ifok,maintenancemethodistoweareveryday,duetobodyoilscanmakesilvernaturalwarmluster. 2.Laundrybathingshouldbetimelytoremoveallkindsofjewelry,topreventjewelrycasealkaliproducts. 3.Avoidcontactwithhairspray,perfume,skincareproductstogether. 4.Whennotwearing,besuretothoroughlydriedbeforestoragetobeplaced,inordertoavoidmoisturetomakethemlosetheirluster. WhatisAlianJewelry? AilianisLoveLasting.AilainisanexpertjewelryproducerbasedinNorthAmerica.Ourartisanscreatethisearringswiththeutmostcraftsmanshipthatfewcompetitorscouldrival.Theearringsofchoiceismadeofsterlingsilverandelectroplatedwithrhodium.Sterlingsilverisanalloycontaining92.5%ofsilverand7.5%ofothermetals.
Product feature: 1 year warranty for any problem of product, 925 Sterling silver sided crystal balls stud earrings, Nickel free & resistance against wear & tear., Match with suitable apparel for different occasion, With beautiful protective velvet bag provided, best gift to your love ones, Package Dimensions: 8 x 6 x 0.5 inches, Shipping Weight: 0.64 ounces, ASIN: B01C6VFJ9W, Date first listed on Amazon: February 25, 2016, Average Customer Review: 4.0 out of 5 stars 1 customer review
Product brand: Ailian
Target attributes: Silhouette
Answer: attribute: silhouette
value: stud
source: product description
attribute: silhouette
value: stud
source: product feature
attribute: silhouette
value: stud
source: product title