undefined method 'sourcedb' for nil

PMC:524371 JSONTXT

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2_test

Id	Subject	Object	Predicate	Lexical cue
15453919-11320389-8196788	2882-2883	11320389	denotes	1
15453919-8913484-8196789	3423-3424	8913484	denotes	2
15453919-8870258-8196789	3423-3424	8870258	denotes	2
15453919-9196115-8196789	3423-3424	9196115	denotes	2
15453919-9661035-8196789	3423-3424	9661035	denotes	2
15453919-11796356-8196789	3423-3424	11796356	denotes	2
15453919-11414594-8196790	4032-4033	11414594	denotes	7
15453919-15373947-8196791	4316-4317	15373947	denotes	9
15453919-8870258-8196792	7030-7031	8870258	denotes	3
15453919-8173779-8196793	9590-9592	8173779	denotes	10
15453919-3195815-8196794	9840-9842	3195815	denotes	11
15453919-8913484-8196795	16314-16315	8913484	denotes	2
15453919-8870258-8196795	16314-16315	8870258	denotes	2
15453919-9196115-8196795	16314-16315	9196115	denotes	2