Assertion: pyramid's structure | /r/HasProperty | the pyramid of userkaf
Facets:
Source sentences:
text: Major pyramids located here include the Pyramid of Djoser – generally identified as the world's oldest substantial monumental structure to be built of dressed stone – the Pyramid of Userkaf, the Pyramid of Teti and the Pyramid of Merikare, dating to the First Intermediate Period of Egypt.