Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: 2016 American Silver Eagle (1 oz) First Strike 30th Anniversary Label $1 MS70 PCGS
Product feature: 2016 American Silver Eagle, Certified PCGS MS70, First Strike - 30th Anniversary Label, Actual Silver Weight: 1 Troy oz
Target attributes: US Special Variety
Answer: attribute: us special variety
value: american silver eagle
source: product title
attribute: us special variety
value: american silver eagle
source: product feature