Fix wording in Fig 1 legend
Fix wording in Fig 1 legend

naupaka/10-simple-rules-data-storage,karawoo/10-simple-rules-data-storage,fmichonneau/10-simple-rules-data-storage,snim2/10-simple-rules-data-storage,jhollist/10-simple-rules-data-storage,PBarmby/10-simple-rules-data-storage,emhart/10-simple-rules-data-storage