premise: Advances in Space Research (ASR) is a peer-reviewed scientific journal that is published 27 times per year by Elsevier. It was established in 1981 and is the official journal of the Committee on Space Research (COSPAR). The editor-in-chief is Pascal Willis.
hypothesis: Pascal Willis was editor -in -chief of ASR in 1981.
reason: It is not know when he became the editor-in-chief. The system did not understand this.