Title: Clothing.
Question: What does polytetrafluoroethylene suppress?

Title: Law of the United States.
Question: What does congress often grant to give rulemaking authority to federal agencies?

Title: Asthma.
Question: How is COPD differentiated?

Title: Quran.
Question:
What is the term for earlier portions of the Quran that may have been superseded by later parts?