Figure 3.

Examples of knowledge retrieval

(A) An example of entity query—retrieving neighborhood context of APOE gene in iBKH.

(B) An example of path query, retrieving drugs that connect to Alzheimer’s disease through the path $disease-\left[Associates\_DiG\right]-gene-\left[Associats\_DG\right]-drug$, where $Associates\_DiG$ and $Associats\_DG$ denote relation types in terms of the association between a pair of disease and gene as well as the association between a gene and a drug.