english: 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.
non_english: Ve gerçek şu ki, son 15 yıl öncesine kadar bunun cevabını bilmiyorduk ve aslında, son 6 ay öncesine kadar bile cevabı bilmiyorduk.