The deprel conj:illustrate is used for dependency relation when the two elements refer to the same semantic entity and one uses a more iconic process than the other (Sallandre 2001). It contributes to the visual representation of the discourse. This syntactic relation is specific to Sign Languages since they use a visual-gestual modality, leading to a lot of iconic processes.
In this example, the presence of a little number of people is encoded with two standardized signs [PERSON] [LITTLE], then the last sign constitutes a visual representation of the same meaning, through an iconic process, namely the use of proform.