Things were a bit hectic for a while there. This clip is the initial call to Ground from your subject a/c, NA508, who was cleared out to Rwy 31R, but things didn't work out that way. First the holdup by Delta 422 (funny)
I left the clip un-edited (in real time). However moments after this, Rwy 31R was closed due to an inbound emergency, Connie919 heavy. Hence the taxi re-routing to 31L for departures.
NA508 did get priority handling for it.