IHM_MODEL_GROUP_LINK category provides the list of structure models present in a particular structure model group.
loop_ _ihm_model_group_link.model_id _ihm_model_group_link.group_id 1 1 2 1 3 1 4 1 5 1 1 2 2 2 3 2 4 3 5 3
loop_ _ihm_model_group_link.model_id _ihm_model_group_link.group_id 1 1 2 2 3 3 4 4 5 5