Assertion: segregation | /r/HasProperty | needed
Facets:
Source sentences:
text: In applications where an ultra-pure surface is needed (for example, in some nanotechnology applications), the segregation of impurities to surfaces requires a much higher purity of bulk material than would be needed if segregation effects didn’t exist.
text: The main justification they used was that segregation was necessary because if African-Americans lived in those neighborhoods, the property values of those neighborhoods would decline.