7. The method of claim 1 , wherein the obtained sets of annotations are clustered into annotation clusters based on the features within the piece of source data identified by the annotations using the distributed data annotation server system.
7. The method of claim 1 , wherein the obtained sets of annotations are clustered into annotation clusters based on the features within the piece of source data identified by the annotations using the distributed data annotation server system. 9. The method of claim 7 , wherein the annotation clusters comprise annotations that are within a distance threshold from the ground truth for the feature identified by the annotations.