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: Sony VAIO VGN-FW235J/H 16.4-Inch Laptop (2.0 GHz Intel Core 2 Duo T5800 Processor, 4 GB RAM, 250 GB Hard Drive, Vista Premium) Gray
Product description: Sony 2 duo t5800;windows vista home premium(64bit);16.4xbrite-eco(1600x900)/16:9 aspe
Product feature: Intel Core 2 Duo T5800 processor (2.0GHz), Genuine Microsoft Windows Vista Home Premium 64bit, 16.4-Inch widescreen display with XBRITE-ECO LCD technology, 4GB of RAM and 250GB Serial ATA HDD, HDMI out for connectivity with compatible HDTVs
Product brand: Sony
Target attributes: Processor Speed
Answer: attribute: processor speed
value: 2.0ghz
source: product feature
attribute: processor speed
value: 2.0 ghz
source: product title