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: US Flag Store Vatican City Flag, 12 by 18-Inch
Product description: This Vatican City stick flag measures 12" x 18" and it is mounted on a 24 inch wooden stick. Flag is made from polyester and printed in bright colors to make an attractive flag. Each flag is individually sewn around the edges.
Product feature: Mounted on a 24 inch wooden staff, Individually sewn edges, Made of polyester
Product price: $7.62
Product brand: US Flag Store
Target attributes: Special Occasion
Answer: attribute: special occasion
value: us
source: product title
attribute: special occasion
value: us
source: product brand