1. Embodied Spoken Interaction Group; Saarland University; Saarbrücken Germany
2. Sign Language Synthesis and Interaction Group; German Research Center for Artificial Intelligence; Saarbrücken Germany
3. LAMIH UMR CNRS 8201 (Laboratory of Industrial and Human Automation Control, Mechanical Engineering and Computer Science); Université de Valenciennes et du Hainaut-Cambrésis; Valenciennes France