Assertion: ufo | /r/HasProperty | recorded in history books
Facets:
value: for thousands of years
type: TEMPORAL
Source sentences:
text: Unidentified Flying Objects, or UFOs as they are commonly known, have been witnessed by millions of people all over the world and have been recorded in history books, myths, legends and traditions for thousands of years.
text: Unidentified Flying Objects, or UFOs as they are commonly known, have been witnessed by millions of people all over the world and have been recorded in history books, myths, legends and traditions for thousands of years.
text: Unidentified Flying Objects, or UFOs as they are commonly known, have been witnessed by millions of people all over the world and have been recorded in history books, myths, legends and traditions for thousands of years.
text: Unidentified Flying Objects, or UFOs as they are commonly known, have been witnessed by millions of people all over the world and have been recorded in history books, myths, legends and traditions for thousands of years.