Assertion: melanin's group | /r/CapableOf | comprise the latter
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Source sentences:
text: Nicolaus (1969) suggested a classification of melanins into three main groups, eumelanins, pheomelanins, and allomelanins , the former two groups comprising animal pigments and the latter encompassing the broad variety of dark non‐nitrogenous pigments of plant, fungal, and bacterial origin.