Complex sentence: The default voicebank Uta Utane borrows her voice from "AquesTalk Female-1" produced by A-quest and premission had been granted for her distribution free with the software.
Split into simpler sentences: The default voicebank Uta Utane borrows her voice from the software AquesTalk, specifically the voice "AquesTalk Female-1" produced by A-quest. Premission had been granted for her distribution free with the software.