Work on Sign Languages (SLs) underline the role of different non-manual markers depending on the type of question: the eyebrows would be raised, and the chin lowered for the production of closed-ended questions, while the eyebrows would be lowered for open-ended questions. Work on French Sign Language (LSF) also seem to validate this contrast but without quantitative analysis. We tested this in the framework of AZee, a formal approach to SL modeling. Results do not show that eyebrows would be the marker of information request in LSF. Additionally, the type of question does not seem to trigger a specific shape of eyebrows. This work instead highlights the role of the chin for all questions.