Complex sentence: Leslie David Gottlieb established the Gottlieb Genetic Biology Foundation dating back to 1959 with the aim of setting up an institute that could conduct genetic research in the agriculture field, but Leslie Gottlieb did not start the Gottlieb Institute until 1968.
Split into simpler sentences: Leslie David Gottlieb established the Gottlieb Genetic Biology Foundation dating back to 1959 with the aim of setting up an institute that could conduct genetic research in the agriculture field. But Leslie Gottlieb did not start the Gottlieb Institute until 1968.