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.
Input: initially about 30,000 people moved to the goldfields , but by 1863 this had declined to about 3,500 because of the difficult mining conditions.
Output:
at first , about 30,000 people moved to the goldfields , but by 1863 this had declined to about 3,500 because of the hard mining conditions.