Information:  - Overtone singingalso known as overtone chanting, harmonic singing or throat singingis a type of singing in which the singer manipulates the resonances (or formants) created as air travels from the lungs, past the vocal folds, and out of the lips to produce a melody.  - A "broken chord" is a chord broken into sequence of notes. A broken chord may repeat some of the notes from the chord and span one or more octaves.  - Bobby McFerrin is the debut album by Bobby McFerrin , released in 1982 .  - A melody ("singing, chanting"), also tune, voice, or line, is a linear succession of musical tones that the listener perceives as a single entity. In its most literal sense, a melody is a combination of pitch and rhythm, while more figuratively, the term can include successions of other musical elements such as tonal color. It may be considered the foreground to the background accompaniment. A line or part need not be a foreground melody.  - A Grammy Award (originally called Gramophone Award), or Grammy, is an honor awarded by The Recording Academy to recognize outstanding achievement in the mainly English-language music industry. The annual presentation ceremony features performances by prominent artists, and the presentation of those awards that have a more popular interest. It shares recognition of the music industry as that of the other performance awards such as the Emmy Awards (television), the Tony Awards (stage performance), and the Academy Awards (motion pictures).  - Robert Keith "Bobby" McFerrin Jr. (born March 11, 1950) is an American jazz vocalist and conductor. He is a ten-time Grammy Award winner, who is known for his unique vocal techniques, such as singing fluidly but with quick and considerable jumps in pitchfor example, sustaining a melody while also rapidly alternating with arpeggios and harmoniesas well as scat singing, polyphonic overtone singing, and improvisational vocal percussion. He is widely known for performing and recording regularly as an unaccompanied solo vocal artist. He has frequently collaborated with other artists from both the jazz and classical scenes.  - In vocal jazz, scat singing is vocal improvisation with wordless vocables, nonsense syllables or without words at all. Scat singing is a difficult technique that requires singers with the ability to sing improvised melodies and rhythms using the voice as an instrument rather than a speaking medium.    Given the information, choose the subject and object entities that have the relation of 'followed by'.
Answer:
bobby mcferrin  , the voice