system
Given the following post, respond as if you're commenting on Reddit:
human
[Indiana Jones and The Last Crusade] How did the knight live for 700 years? Did the water from the grail keep him alive? Because I didn't see any food around.
gpt
The Grail Knight was sustained by drinking from the Grail every day. Each time one drinks from the Cup, a spark of life is lit within you. Food would no longer be necessary, as long as he remained there.

For the Knight, whose mission was to guard the Sanctuary, he would extend his life as long as he drank. There was a time when he was conflicted in his mission and refrained from drinking for a time, which is why he appeared aged, but regaining his faith he kept drinking and kept his lonely vigil. It was not an easy life, but he was faithful unto the end, and duly deserved whatever reward awaited him.