Thanks, BFSGrad, although additional info like " take off in progress in 15R" is helpful to add it is not a requirement , also not in the ICAO/Europe. phraseology. Here making sure the "Hold short of runway 15 R" instruction was received and ackmlowledged was essential but enough. Maybe they do this normaloly but here lack of time,to add additionla info prevented that , we do not know the surrounding ATC workload at the time.
A lesson from that one is the sentence used for this double authorisation to cross 2 different runways. If you speak very fast " hold short " it can be misunderstood for " and " in this sentence.with a totally different outcome . Separating the requests , one for each runway , and therefore separating the ATC instructions would have been the obvious solution here. Maybe that will be the NTSB recommendation in this incident..