Assertion: astronomer's observation | /r/AtLocation | ancient poetry
Facets:
value: ambiguously
type: MANNER
value: to early as 4000 bc
type: TEMPORAL
Source sentences:
text: Since the 19th century, numerous scholars have sought to use archaeoastronomical calculations to demonstrate the antiquity of Ancient Indian Vedic culture, computing the dates of astronomical observations ambiguously described in ancient poetry to as early as 4000 BC.