Input (grade 13): Both his parents were musicians - his mother, a singer, was the director of a children's orphanage, while his father was the first oboist of the Novosibirsk Philharmonic Symphony Orchestra.
Output (grade 7): His parents were musicians. His mother was a singer who was the director of a children's orphanage. His father was the first oboist of the Novosibirsk Philharmonic Symphony Orchestra.