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: Tribeca FVA3711 Varsity Jacket (Silicone) iPodTouch - 4th Generation - Seattle Seahawks - Dark Blue
Product description: Varsity Jacket (Silicone) - iPod Touch - 4th Generation - Seattle Seahawks - Dark Blue
Product feature: Varsity Jacket (Silicone) - iPod Touch - 4th Generation - Seattle Seahawks - Dark Blue, Easy access to ports and controls, Slim design adds style, not bulk, Protective shield for iPod Touch 4G (4th Generation); official Seattle Seahawks NFL logo on back, Constructed of durable, flexible silicone in dark blue, Laser-engraved logo won't fade or rub off, Designed to fit iPod Touch 4G; also available for iPod Touch 2G and 3G, Manufacturer warranty against defects
Product brand: Tribeca
Target attributes: Compatibility
Answer: attribute: compatibility
value: ipod
source: product description
attribute: compatibility
value: ipod
source: product feature
attribute: compatibility
value: for ipod
source: product feature