TASK DEFINITION: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
PROBLEM: towards the end of 1997 , each band member chose an individual number as their alias.

SOLUTION: towards the end of 1997 , each band member selected a unique number as their false name.

PROBLEM: during this period he married , and farmed in lyndhurst , hampshire.

SOLUTION: during this time he married , and farmed in lyndhurst , hampshire.

PROBLEM: in practice , however , the definition means that high-precision realizations of the second should compensate for the effects of the ambient temperature -lrb- black-body radiation -rrb- within which atomic clocks operate , and extrapolate accordingly to the value of the second at a temperature of absolute zero.

SOLUTION:
in practice , the definition means the high-precision realizations of the second should compensate for the effects of the ambient temperature which is how atomic clocks operate.