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: El Casco M-1LN Stapler, Small, Black with 23 Karat Gold Accents
Product description: Desk stapler polished steel and zaman. Black lacquered body and gold plated components. Uses 26/6 staples. Presented in a black gift box. Dimensions: 11x10x5 cm. Weight: 0.3 Kg.
Product feature: polished steel and zamak, Black lacquered body and gold plated components, Uses 26/6 staples one box included. 25 sheets capacity, Presented in a black gift box, Dimensions: 11x10x5 cm Weight: 0.3 Kg
Product brand: El Casco
Target attributes: Paper Capacity
Answer: attribute: paper capacity
value: None
source: None