[
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        } 
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        "binding-potential-energy-per-formula" {
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    {
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        "prototype-label" {
            "source-value" "A2B_hP18_162_fgi_k"
        } 
        "stoichiometric-species" {
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        } 
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            "source-unit" "K" 
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            "source-value" "instance-2.poscar"
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]