Our analysis suggests that CLICS has learned the concepts of connected polyhderal geometries to some extent but as a distinct concept when the crystal is specifically characterized with the connected polyhedra rather than each single local geometry. This observation also suggests a limitation of CLICS that, although the geometric concepts have been embedded on the feature space and the relationships among the local atomic environments were also acquired, CLICS cannot reach the relationships between each local atomic environment and each connected polyhedral geometry. Additional mechanisms would be required to learn the relationships.