What is the title of the popular song from the 1953 musical 'Kismet' that has been covered by many musicians?  

"I've seen fire and I've seen rain. I've seen sunny days that I thought would never end. I've seen lonely times when I could not find a friend
But I always thought that I'd see you again" are some of the words to this popular 1970 song. Who gave us this unforgettable classic?