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.
--------
Question: they are rivaled as biological materials in toughness only by chitin.

Answer: only chitin rivals them as biological materials.


Question: melodifestivalen 2008 on february 23 oliv participated in melodifestivalen 2008 , as she played cello during mickey huskic entry in semifinal three.

Answer: melodifestivalen 2008 : on february 23 oliv participated in melodifestivalen 2008 , she played cello during mickey huskic entry in semfinal three.


Question: these rock formations are characteristically composed of sandstone with layers of quartz.

Answer:
these rock formations are characteristically made of sandstone with layers of quartz.