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: HADRIAN. SALUS feeding a Serpent. Rome Mint. Æ As.
Product feature: Hadrian, Rome Mint, Salus feeding a Serpent, Ancient Coin House
Product brand: Ancient Coin House
Target attributes: Nationality
Answer: attribute: nationality
value: None
source: None