Complex sentence: He strung the bass with LaBella flatwound bass strings that he did not change for 20 years and his style is distinctive, with a resonant, bright tone produced, in part, by his use of a plectrum (pick).
Split into simpler sentences: He strung the bass with LaBella flatwounds that he did not change for 20 years. His style is distinctive, with a resonant, bright tone produced, in part, by his use of a plectrum (pick).