Complex sentence: Terra Nera purchased the entire production of the Uchunari coffee and introduced a rigid grading system, the staff carefully analyses under magnifying lenses in the UK offices each bean and only less than 20% of the entire lot makes it through to the 0 grade batches.
Split into simpler sentences: Terra Nera purchased the entire production of the Uchunari coffee and introduced a rigid grading system, the staff analyses under magnifying lenses in the UK offices each bean. Less than 20% of the entire lot makes it through to the 0 grade batches.