Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Franklin Sports MLB Fielding Trainer
Product description: Franklin Sports MLB Fielding Trainer helps develop proper fielding mechanics by teaching infielders to absorb the impact of ground balls with "soft hands." It is also a great tool for developing agility and proper footwork, by forcing infielders to get in front of the ball, as opposed to reaching for grounders.
Product feature: Durable, EVA foam construction with contoured back, Thick foam takes the "sting" out of hard hit balls, One size fits most, For both left and right-handed players
Product price: $15.05
Product brand: Franklin Sports
Target attributes: Size
Answer: attribute: size
value: None
source: None