1. LRI, Univ. Paris-Sud, CNRS, INRIA, Université Paris-Saclay & TecKnowMetrix, Orsay, France
2. Univ. Paris-Sud, CNRS, Inria, Université Paris-Saclay, Orsay, France
3. University of Edinburgh, Edinburgh, United Kingdom
4. Microsoft Research, Redmond, WA, USA