Filecoin
Filecoin ( ⨎ ) is an open-source , public , cryptocurrency and digital payment system intended to be a blockchain-based cooperative digital storage and data retrieval method . 
<triplet> Filecoin <subj> cryptocurrency <obj> instance of <subj> blockchain <obj> uses <triplet> cryptocurrency <subj> payment system <obj> subclass of <subj> blockchain <obj> based on <triplet> blockchain <subj> cryptocurrency <obj> used by