Assertion: yam's root | /r/HasProperty | purple
Facets:
value: in the 10th century
type: TEMPORAL
Source sentences:
text: In the 10th century, roots from West Asia, India and Europe were purple.
text: What is Ube Yam - Ube yam look a lot like taro root but they are a climbing vine that creates roots which are purple and highly nutritious.