Gonna be a subclass of class of musical instruments (Q1254773).

1. Move everything from 'class of musical instrument' to 'type of musical instrument': https://w.wiki/3V3k + https://w.wiki/3c32
2. fill in 'type of musical instrument' with subclasses of musical instrument: https://w.wiki/3V3h
3. fill in 'type of musical instrument' with instances of musical instrument: https://w.wiki/3c33 . Exclude all every personal (belonged to someone) instruments.
4. fill in 'class of musical instrument' with exact largest classes/families of instrument (sources: family @ https://musicbrainz.org/instruments, https://en.wikipedia.org/wiki/Family_(musical_instruments), etc)