Task: Paraphrasing
Input (English): Question: What do you call materials able to conduct electricity with 100% efficiency, meaning that no energy is lost during the electrical transmission? 
Answer: superconductors. 
Sentence: You call materials able to conduct electricity with 100% efficiency, meaning that no energy is lost during the electrical transmission, superconductors.
Output (English): During the electrical transmission superconductors looses no energy, and hence those materials are able to conduct electricity with 100% efficiency.