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: Maymeenth Womens Closed Round Toe Toe Kitten Heel Patent Leather PU Solid Pumps with Bowknot
Product description: Maymeenth for the majority of female consumers with stylish, elegant, easy to match women's footwear products, we believe there will be one pair of shoes belonging to your beauty.
Product feature: patent-leather, rubber sole, Heel Hight approximately 1 3/4", Upper Materials: Patent Leather; Lining Material: PU, Element: Bowknot, Rhinestones, Condition: Brand New with Box; Made In China, We have updated the size chart, please refer to our new size chart., ASIN: B00JSEG0G2, Date first listed on Amazon: April 19, 2014, Average Customer Review: 2.0 out of 5 stars 1 customer review
Product brand: Maymeenth
Target attributes: Toe Style
Answer: attribute: toe style
value: round toe
source: product title