Assertion: mound | /r/HasProperty | built by native american people
Facets:
Source sentences:
text: The first theories were the most accurate; people in the late 17th century assumed that the mounds had been built by the Native American people who still lived in the vicinity.
text: Because the new Euroamerican settlers could not, or did not want to, believe that the mounds had been built by the Native American peoples they were displacing as fast as they could, some of them—including the scholarly community—began to formulate a theory of the "lost race of mound builders.