The mouse discovers that every sound of the instrument is produced by a vibration of the strings, and the vibration of the strings by taps of the hammers.
(The mouse; discovers; that every sound of the instrument is produced by a vibration of the strings) Context(The mouse discovers,List([0, 19))):(every sound of the instrument; is produced; by a vibration of the strings)
The mouse discovers,List([0, 19))
The mouse every sound of the instrument
discovers is produced
that every sound of the instrument is produced by a vibration of the strings
by a vibration of the strings