Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Sterling Silver Created Blue Opal Starfish Pendant with 18" Chain
Product description: Created Opals make this pendant a stand-out
Product feature: Created Opals make this pendant a stand-out, Crafted of 925 Sterling Silver, Gift box included, ASIN: B01E9GE9L6, Item model number: amk6201, Date first listed on Amazon: March 21, 2016, Average Customer Review: 5.0 out of 5 stars 1 customer review
Target attributes: Birth Month
Answer: attribute: birth month
value: opal
source: product title
attribute: birth month
value: opals
source: product description