ELAN annotation files (.eaf) for the video files containing the productions of 6 signers of Sign Language of the Netherlands in a production experiment on biased polar questions. Each annotation file comprises annotations for non-manual and manual markers, as well as sentence structure, of five questions from one participant in one experimental condition. File naming convention: participant number - version (related to presentation of stimuli) - condition Condition names: declarative = declarative sentence (participants 03 to 07) baseline = regular polar question PosNeg etc. = first abbreviation indicates original speaker bias (positive/neutral/negative); second abbreviation indicates contextual evidence (positive/neutral/negative). Video files can be found here: https://doi.org/10.21942/uva.21666203 For details about the experimental design of the production task, see: https://doi.org/10.21942/uva.21701954