original: since 1980 the senior pastor has been john piper .
simplifications: since 1980 the main pastor has been john piper . john piper has been the senior pastor since 1980 . since 1980 the senior pastor has been john piper . from 1980 the senior pastor -lrb- a minister in charge of a christian church or congregation -rrb- has been john piper . since 1980 the senior pastor has been john piper . john piper has been the senior pastor since 1980 . right from nineteen eighty onwards the senior pastor has been referred to as john piper . 1 . since 1980 the lead and oldest pastor has been john piper .