Task: Paraphrasing
Input (English): Question: Which body system typically recognizes, attacks, and destroys foreign cells or substances that may cause disease? 
Answer: immune. 
Sentence: The immune system typically recognizes, attacks, and destroys foreign cells or substances that may cause disease.
Output (English): If a foreign substance (including foreign cells) gets into the body, and the immune system can recognize it as foreign, the immune system will work to attack and destroy that substance.