Does 'At 9:39, the FAA's Cleveland Air Route Traffic Control Center overheard a second announcement indicating that there was a bomb on board, that the plane was returning to the airport, and that they should remain seated.' exist in a separate context from 'The FAA's Cleveland Air Route Traffic Control Center heard an announcement about a spider being let loose.', without logical interdependence?
At 9:39, the FAA's Cleveland Air Route Traffic Control Center overheard a second announcement indicating that there was a bomb on board, that the plane was returning to the airport, and that they should remain seated.###The FAA's Cleveland Air Route Traffic Control Center heard an announcement about a spider being let loose.