has specified input has_specified_input is specified output of is_specified_output_of material combination processed specimen specimen pool of specimens GROUP: CEBS PERSON: Jennifer Fostel pool of specimens A pool of specimens is a mixture of a population of samples which have been gathered from one or more sample populations, obtained by the physical process of mixing individual specimens, e.g. mixing the DNA collected from the individual fish. check with advisors as to how to represent multiple instances of any class? a set of specimens which have been gathered from one or more sample_populations, obtained by the physical process of mixing individual specimens, e.g. mixing the DNA collected from the individual fish metadata complete