Before revision: We will discuss how over the last 30 to 50 years,  systems that focused only on data have been handicapped with success focused on narrowly focused tasks, and knowledge has been critical in developing smarter, intelligent,  more effective systems.
After revision: We will discuss how over the last 30 to 50 years, systems that focused only on data have been handicapped , and how knowledge has been critical in developing smarter, intelligent, more effective systems.