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1. The amount of oil is needed for one week that the rocket is expected to take to reach the moon.

2. The amount of oil is needed for one week which the rocket is expected to take to reach the moon.

3. The amount of oil is needed for one week, which the rocket is expected to take to reach the moon.


I wonder what "that" and "which" is indicating in each sentence.

I think without further context, "that" and "which" are all indicating "the amount of oil" or "one week".

Is my thinking right?

I already know well those sentences are very sloppy as they look so ambiguous, but please could you answer my question given those sentences?

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Let me change the sentences so that they read better.

1. This amount of oil is needed for the one week that the rocket is expected to take to reach the moon.
2. This amount of oil is needed for the one week which the rocket is expected to take to reach the moon.
3. This amount of oil is needed for one week, which the rocket is expected to take to reach the moon.

"that" and "which" must refer to "one week".

By the way, "oil" is a slightly unexpected word in connection with a rocket. However, I guess it is possible that oil could be needed for some purpose or other.