Before revision:  Based on the assumption that a node and its nearest neighbors should belong to the same cluster, we devise the neighbor cluster pooling (NCPool)  to select the most informative subset of vertices based on the clustering assignments of nodes and their nearest neighbor .
After revision:  Based on the assumption that a node and its nearest neighbors should belong to the same cluster, we devise the neighbor cluster pooling (NCPool) to select the most informative subset of vertices based on the clustering assignments of nodes and their nearest neighbors to the cluster centers .