@Carl89
You don't need to call them up, just read the Anns and listen to the interviews.
I posted a few days ago about how the Li and Ni are close about 200m or so...so there will be a single hole between them and that is what you call a synergy.
Try looking at the other threads, it's Friday evening I'm too knackered giving you the links.. Also worth noting: Mark Creasy is a definite plus.