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: Men's Red Army Camo Cargo Shorts Size: 32 to 34 (36)
Product description: New Men's Focus Red Army Camo Cargo Shorts 100% Cotton Length: 13 inches comes with belt
Product feature: 100% Cotton, New Men's Focus Red Army Camo Cargo Shorts, 100% Cotton, Length: 13 inches, Comes with belt, Shipping Weight: 2 pounds, ASIN: B00YDH72NE, Item model number: Red 36, Date first listed on Amazon: May 27, 2015, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product brand: Focus
Target attributes: Pattern
Answer: attribute: pattern
value: camo cargo shorts
source: product feature
attribute: pattern
value: camo cargo shorts
source: product title
attribute: pattern
value: camo cargo shorts
source: product description