Teacher: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.
Teacher: Now, understand the problem? Solve this instance: This idea was later discarded : the nucleus and the ring have the same redshift , and the ring shows knotty structure which would not be visible with gravitational lensing .
Student:
This idea was later discarded because the nucleus and the ring have the same redshift , and because more advanced telescopes revealed the knotty structure of the ring , something that would not be visible if the ring were the product of gravitational lensing .