premise: The Secretary of the Interior or any duly authorized representative shall be entitled to admission to , and to require reports from the operator of , any metal or nonmetallic mine which is in a State ( excluding any coal or lignite mine ) , the products of which regularly enter commerce or the operations of which substantially affect commerce , for the purpose of gathering <mask> and information necessary for the study authorized in the first section of this Act .
hypothesis: the proper context for <mask> here should be an item of factual information derived from measurement or research