Banyere enriched ajụ, na ya pụta na Ansolabehere na Hersh (2012) mgbabere uzo on abụọ isi nzọụkwụ: 1) ikike nke Catalist ikpokọta ọtụtụ disparate data isi mmalite na-emepụta ezi-nwe-datafile na 2) ikike nke Catalist ejikọta ihe nnyocha e mere data na- nwe ya datafile.
