Question: In 1998, Which member left the group that released the album "Nature's Symphony in 432"?
Sentence (from "The Isaacs"): The Isaacs are a country and bluegrass gospel music group consisting of mother Lily Isaacs, and daughters Becky and Sonya Isaacs and son Ben Isaacs, along with John Bowman (husband of Becky Isaacs) as an instrumentalist and songwriter.
Relevant evidence: No