Detailed Instructions: 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:the sheer weight of the continental icecap sitting on top of lake vostok is believed to contribute to the high oxygen concentration.
Solution:
the large weight of the continental icecap sitting on top of lake vostok is thought to add to the high oxygen level.