و الحقائق تقول، اننا لم نعرف الاجابة على هذا السؤال بعد حتى بالعودة للخمسة عشر عاما الماضية ، في الحقيقة ، نحن حقا لم نعرف حتى الستة اشهر الماضية
And the facts are, we didn't know the answer to that even as recently as 15 years ago, and in fact, we really didn't know it even as recently as six months ago.