Before revision:  We also perform ablation studies which reveal that fundamental frequency is a pertinent feature . We also find that a model trained on the data of one speaker only also works for the other speaker of the same conversation.
After revision:  We also perform ablation studies which reveal that fundamental frequency is a relevant feature for gesture prediction task. In another sub-experiment, we find that including eyebrow movements as acting as beat gesture improves the performance. Besides, we also find that a model trained on the data of one speaker only also works for the other speaker of the same conversation.