Systematic review of question answering over knowledge bases

Over the years, a growing number of semantic data repositories havebeen made available on the web. However, this has created new challenges in exploiting these resources efficiently. Querying services require knowledge beyond the typical user’s expertise, which is a critical issue in adopting semantic information solutions. Several proposals to overcome this dif-ficulty have suggested using question answering (QA) systems to provide user ‐ friendly interfaces and allow natural language use. Because question answering over knowledge bases (KBQAs) is a very active research topic, a comprehensive view of the field is essential. The purpose of this study was to conduct a systematic review of methods and systems for KBQAs to identify their main advantages and limitations. The inclusion criteria rationale was English full ‐ text articles published since 2015 on methods and systems for KBQAs. Sixty ‐ six articles were reviewed to describe their underlying reference architectures.