keep if has free fulltext url
keep if has free fulltext url

total-impact/total-impact-webapp,Impactstory/total-impact-webapp,Impactstory/total-impact-webapp,Impactstory/total-impact-webapp,total-impact/total-impact-webapp,total-impact/total-impact-webapp,total-impact/total-impact-webapp,Impactstory/total-impact-webapp