wasDerivedFrom(e5,e3,a4,g2,u2,[])
wasDerivedFrom(e5,e3,a4,g2,u2,[prov:steps="1"])

wasDerivedFrom(e3,e2,[prov:steps="1"])

wasDerivedFrom(e2,e1,[])
wasDerivedFrom(e2,e1,[prov:steps="n"])