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: 14k Yellow Gold Dancer in Circle Charm Pendant - 25mm
Product feature: Shipping Weight: 1 pounds, ASIN: B00GWU2B3Q, Date first listed on Amazon: November 25, 2013, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Glamerous Gold
Target attributes: Shape
Answer: attribute: shape
value: circle
source: product title