Assertion: general system collapse | /r/HasProperty | put as explanation
Facets:
value: for the reversals in culture
type: PURPOSE
value: forward
type: MANNER
Source sentences:
text: A general systems collapse has been put forward as an explanation for the reversals in culture that occurred between the Urnfield culture of the 12th and 13th centuries BCE and the rise of the Celtic Hallstatt culture in the 9th and 10th centuries BCE.
text: A general systems collapse has been put forward as an explanation for the reversals in culture.