You are given a sentence and your task is to generate another sentence that supports the given input.
One example: In spite of this reduced heat input, the surface temperature of Venus is higher than that of the Earth.
Solution is here: Venus has a warmer average surface temperature than earth.
Explanation: Output statement supports the input statement's claim about the temperatures of Venus being higher than the earth.

Now, solve this: Some of these isotopes have half-lives of tens of thousands of years, and therefore require long-term isolation.
Solution:
The long-lived isotopes require thousands of years to decay to a safe level in a nuclear reactor.