some suggestions about linking a variation graph

Question

[f.falanga7]

Hi, I have two genome of Escherichia Coli K-12 and O-157 they was in variation graph format and they was converted to rdf and put into virtuoso, on their web site here https://github.com/vgteam/vg/wiki/VG-RDF,-the-Ensembl-bacteria-E.-coli-genome-hack-attack they suggest a sparql query to link the genome with ensembl bacteria, can you suggest me some sparql query to link it with gene ontology, uni prot kegg or some other ontology? I'm not expert about genetics I'm a computer engineer so I know about sparql rdf etc. Thank you so much