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: Dora the Explorer Toddler Black Tunic Top 8E7316
Product description: Show your sweet Dora style wearing this darling Nickelodeon Dora the Explorer tunic top. This Nickelodeon Dora the Explorer tunic top features bright colors, ribbed-knit collar, long sleeves, and cute glittered graphics! Longer tunic length is perfect to wear with your favorite pair of leggings. Any little fan of the fun show on Nick Jr., Dora the Explorer!
Product feature: Cotton/Poly Blend, Machine Wash Cold, Black/Hot Pink, Officially licensed Nickelodeon Dora the Explorer kids apparel, Tailored from a soft cotton blend for comfort and durability, Colorful graphics, long sleeve and longer tunic length, Machine Washable; Imported, Product Dimensions: 3 x 3 x 0.5 inches, Shipping Weight: 4 ounces, ASIN: B00I09X26C, Date first listed on Amazon: January 23, 2014, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Nick Jr
Target attributes: Age Group
Answer: attribute: age group
value: 3
source: product feature
attribute: age group
value: toddler
source: product title