Assertion: naics code | /r/HasProperty | collapsed into new 6-digit industry
Facets:
Source sentences:
text: 2012 NAICS codes 212231, Lead Ore and Zinc Ore Mining, and 212234, Copper Ore and Nickel Ore Mining, were collapsed into a new 6-digit industry: 212230, Copper, Nickel, Lead, and Zinc Mining.