Search strategies usually follow an iterative process. Given that it is not possible to determine a article’s relevance by
simply reviewing its title, the authors agreed to review the abstracts of the remaining 110 articles separately to avoid bias
and to ensure the complete coverage of all related articles. Ultimately, 40 articles were short-listed by both authors as
being most relevant based on the defined criteria. Disagreements between the authors after screening the titles and read-
ing the abstracts were resolved either by achieving mutual consensus or by creating a list of articles to go under a more
detailed review. The article-selection process is illustrated in Figure 1. We also identified five survey articles during the
selection process and reviewed them separately. These articles were also included in this study.

With respect to the review strategy, each author reviewed 20 articles based on the dimensions discussed in the three
Knowledge-graph-based explainable AI- A systematic review