Part 1. Definition
In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Part 2. Example
The Inheritance Cycle is a series of fantasy books written by Christopher Paolini.
Answer: The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini.
Explanation: The output sentence elaborates on the input sentence without changing its general meaning e.g. "tetralogy of young adult high fantasy novels".
Part 3. Exercise
Self-driving cars could take people where they wanted to go at a lower cost than a taxi or ridesharer .
Answer:
Autonomous vehicles could allow the public to use roads in low cost-per-kilometre , self-navigating vehicles to a preferred destination at a significantly lower cost than current taxi and ridesharing prices .