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: Stanzino Women's Black Sleeveless Racerback Studded Maxi Dress black S
Product feature: 5% spandex, The approximate length from the top center back to the hem is 50"", The measurement was taken from a size Medium., Closure: Pull-Over, Materials: 95% POLYESTER 5% SPANDEX, Machine washable, Shipping Weight: 8 ounces, ASIN: B00C12LB8U, Date first listed on Amazon: March 25, 2013, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Stanzino
Target attributes: Length
Answer: attribute: length
value: maxi dress
source: product title