Assertion: purple potato | /r/MadeOf | anthocyanin
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Source sentences:
text: Venkata Charepalli, Lavanya Reddivari, et al, researchers at the Pennsylvania State University, USA published a study in the Journal of Nutritional Biochemistry, which stated that purple potatoes consist of several substances such as anthocyanins, chlorogenic acid, and resistant starch that help in killing the colon cancer stem cells.