This is a paraphrasing task. In this task, you're given a sentence and your task is to generate another sentence which express same meaning as the input using different words.
Q: second plea in law , alleging a substantive amendment to the initial conditions of the contract liable to distort the result of the call for tenders .
A:
the second plea alleges a significant change in the original terms of the contract , which could have distorted the outcome of the award procedure .