Complex sentence: On September 10,1977, Davis spoke to members of the People's Temple living in Guyana within Jonestown via radio-phone dispatch 14 months before the group's mass murder-suicide.
Split into simpler sentences: On September 10,1977, Davis spoke via radio-phone dispatch to members of his People's Temple living in Guyana within Jonestown. This was 14 months before the group's mass murder-suicide.