Revises questions raised by @fergunet
Revises questions raised by @fergunet

Closes #19

geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN,geneura-papers/2016-ea-languages-PPSN