Question: Who is the Estonian composer of classical and religious music that was featured in the recording of twenty one duets for two cellos and piano or harp ranging from the sixteenth to the twenty-first century?
Sentence (from "Arvo Pärt"): Since the late 1970s, Pärt has worked in a minimalist style that employs his self-invented compositional technique, tintinnabuli.
Relevant evidence: No