| http://www.w3.org/ns/prov#value | - I use this code to create arrays inside array.array_push($lists, $list);And then I try to add items to nested arrays:array_push($lists[$list], $item);But get an error:Warning: array_push() expects parameter 1 to be array, null given in V:home...$list is some name, $item is an object.
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