Before revision:  The ensemble of specialized classifiers (ESC) can better generalize, leading to an average improvement of 56 \% in F1 score for unseen accounts across datasets. Furthermore, novel bot behaviors are learned with fewer labeled examples during retraining. We are deploying ESC in the newest version of Botometer, a popular tool to detect social bots in the wild.
After revision:  The ensemble of specialized classifiers (ESC) can better generalize, leading to an average improvement of 56