Complex sentence: Hide and Navi formed rock duo "Greeen" in 2002 and the group was renamed "Greeeen" in 2004 when 92 and Soh joined the group.
Split into simpler sentences: Hide and Navi formed duo "Greeen" in 2002. However, the group was renamed "Greeeen" in 2004 when 92 and Soh joined the group.