Formulate questions about the information mentioned in a given passage.

Example input: context: A person is trying to roll an apple, a ball, a block, and a bottle.
Example output: What is the person trying to do?
Example explanation: This question can be directly answered from the context.
Q: context: Four balls are dropped. The first is dropped from the height equivalent of a microwave, the second is dropped from the height equivalent of a book, the third is dropped from the height equivalent of a car, and the fourth is dropped from the height equivalent of a mountain.
A:
What are the things that are dropped?