Assertion: artificial slate | /r/HasProperty | followed by fibre cement artificial slates
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Source sentences:
text: MacMillan (2018), a New Zealand slate roofing company, notes that in that country "asbestos slates" or "artificial slates" had been used from the early 1900s until 1979, followed by fibre cement artificial slates (ca 1980-1988) that did not perform well, failing after just a few years.