We heard a lot of good ideas from people who've been contributing for many years to pro bono service, said Mr. Curnin. 
Throughout all the years, we never heard a single useful idea from the people who contributed.
mnli hypothesis: Throughout all the years, we never heard a single useful idea from the people who contributed. premise: We heard a lot of good ideas from people who've been contributing for many years to pro bono service, said Mr. Curnin. 