25 stellar groups recovered by SNN with our procedure to identify repeated groups in parameter space. Groups 13 and 18 are omitted as they appear to be duplicates of Group 3. The organization of the panels is exactly the same as in Fig. 1. The groups are presented in three rows to provide the maximum separation in the three projections. Distinct colors in each row represent distinct stellar groups. Again, it should be noted that the same colors are used to represent different groups in different rows. The stellar groups are assigned unique numeric label, which are also used in Table 1 to refer to each group. Compared to EnLink results in Fig. 1, the SNN stellar groups are slightly more spatially spread out but have much tighter distributions in proper motion space.