Assertion: harmonica's key | /r/ObjectUse | used by blues players
Facets:
value: frequently
type: TEMPORAL
Source sentences:
text: For example the Mixolydian mode (root note is the second draw or third blow), produces a major dominant seventh key that is frequently used by blues players because it contains the harmonically rich dominant seventh note, while the Dorian mode (root note is four draw) produces a minor dominant seventh key.