Assertion: mound | /r/HasProperty | disproven by archaeological research
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Source sentences:
text: Thomas Pownall conducted a very detailed survey of New Grange in 1769, which numbers all the stones and also records some of the carvings on the stone and asserted that the mound originally had been taller and a lot of the stone on top of it had been removed, a theory that has been disproven by archaeological research.