Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: GOARTEA 500g (17.6 Oz) Organic Premium Roasted Natural Soba Health Beauty Tartary Buckwheat Grain Herbal Tea
Product description: Our registered brand to USPTO: GOARTEA How to Choice the tea from GOARTEA Tea House? All our tea grade marked the follow standard: ----------->>>-----more better--->>>------- Normal, premium, Supreme, Top, Nonpareil Supreme. ----------->>>-----more better--->>>------- AAA, AAA+, AAAA, AAAA+, AAAAA, AAAAA+, AAAAA+++. Buckwheat tea, also called soba-cha, Buckwheat tea has been used for a very long time in China. Contrary to popular belief, buckwheat bears no relation to wheat, it is the seed of a fruit related to rhubarb. The buckwheat plant grows small white flowers and bright green leaves. The groats, or seeds, are used to make buckwheat tea. It has a distinct malty aroma. It tastes rich and beefy, like coffee but without the bitterness. Usage: Use 1 teaspoon Tartary Buckwheat tea for every 6-8 oz boiling water. Brew for 2-5 minutes. Storage: Protect against the tide, peculiar smell, keeps in low temperature and refrigerates it.
Product price: $26.98
Product brand: GOARTEA
Target attributes: Sweetness
Answer: attribute: sweetness
value: None
source: None