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

Answer: only chitin rivals them as biological materials.


Question: the race culminates with 750m on the smooth concrete of the large outdoor velodrome in roubaix.

Answer: the race ends with 750m on the smooth concrete of the large outdoor cycling arena in roubaix.


Question: oliver cromwell attacked drogheda in 1649 slaughtering the royalist garrison -lrb- siege of drogheda -rrb-.

Answer:
oliver cromwell attacked drogheda in 1649 killing the royalist garrison -lrb- siege of drogheda -rrb-.