The second group of sixth chords includes inverted major and minor chords, which may be called sixth chords in that the six-three () and six-four () chords contain intervals of a sixth with the bass note, though this is not the root. Nowadays, this is mostly for academic study or analysis (see figured bass) but the Neapolitan sixth chord is an important example; a major triad with a flat supertonic scale degree as its root that is called a "sixth" because it is almost always found in first inversion. Though a technically accurate Roman numeral analysis would be II, it is generally labelled N6. In C major, the chord is notated (from root position) D, F, A. Because it uses chromatically altered tones, this chord is often grouped with the borrowed chords but the chord is not borrowed from the relative major or minor and it may appear in both major and minor keys.