Sergei O. Prokofieff
He was the grandson of the composer Sergei Prokofiev and his first wife Lina Prokofiev , and the son of Oleg Prokofiev and his first wife Sofia Korovina . 
<triplet> Sergei Prokofiev <subj> Lina Prokofiev <obj> spouse <subj> Oleg Prokofiev <obj> child <triplet> Lina Prokofiev <subj> Sergei Prokofiev <obj> spouse <subj> Oleg Prokofiev <obj> child <triplet> Oleg Prokofiev <subj> Sergei Prokofiev <obj> father <subj> Lina Prokofiev <obj> mother