human
Riddle:
Thirty white horses on a red hill,
First they champ,
Then they stamp,
Then they stand still.
What are the 30 white horses?

gpt
--- Reasoning ---
1. Is the question multiple-choice question?
No
2. Is it implied multiple-choice question?
No
3. If two experts were independently asked the question, will the final answer be exactly the same?
Yes

--- Answer ---
grounded