What is the US Constitution written on? What is #1 made of? What does PETA hate? How is #2 acquired? Is there an overlap between #3 and #4?
Constitution of the United States
The Constitution of the United States is written on parchment. Parchment is  writing material made from specially prepared untanned skins of animals. PETA is an organization that advocates for the ethical treatment of animals.
Supreme law of the United States of America
Would Constitution of the United States paper offend PETA?