The PDF comprises two interlinearized questionaires.
1: Actants propositionnels / Complétives et prédicats en dépendance: developed by Groupe des linguistes africanistes russes, c/o Valentin Vydrin (vydrin@vjf.cnrs.fr) (français révisé par Stéphane Robert)
2: Negation and phasal polarity: based on QUESTIONNAIRE FOR DESCRIBING THE NEGATION SYSTEM OF A LANGUAGEby Matti Miestamo [February 2019, revisions done together with Ljuba Veselinova
The speaker is Baba Yussuf, born in 1998, working as truck mechanic in Ngaoundéré (Adamawa, Cameroon), L1 Mbum, L2 Fulfulde, L3 French