Complex sentence: The initial version was noticeably more demanding on the virtuosic skills of the soloist and was revived in the early 1990s on the BIS record label by violinist Leonidas Kavakos, with the permission of Sibelius' heirs.
Split into simpler sentences: The initial version was noticeably more demanding on the virtuosic skills of the soloist and was revived in the early 1990s on the BIS record label by violinist Leonidas Kavakos. The recording of the first version was made with the permission of Sibelius' heirs.