geneA	geneB	physical association	other_attr1
geneA	geneE	physical association	other_attr2
geneB	geneE	physical association	other_attr3
geneE	geneF	physical association	other_attr4
geneE	geneD	physical association	other_attr5
geneE	geneC	physical association	other_attr6
geneD	geneC	physical association	other_attr7
