JQL to get Stories linked to Epics of a specific Initiative

[Chander Inguva]

Is it possible to get all Stories tied to Epic given an Initiative.

I was able to get this by two separate queries 

query 1: Using Parent Link = "XYZ" i got Epics linked to an initiative

query 2: Using Epic Link = "ABC" i got stories linked to Epic.

How to achieve this in a single query.

P.S: We use Script Runner as well

Thank You

Chander

[Nic Brough -Adaptavist-]

Already answered at https://answers.atlassian.com/questions/252843/how-to-find-the-unmapped-groups-in-jira