human
Answer from the following data.

Question: how does LNER ensure standards?

Data: LNER trains are always so clean because LNER has a team of 360 specialists who have been working around-the-clock delivering more than half a million hours of enhanced cleaning this past year. They use high-grade equipment and sustainable products, and conduct several independent train cleaning audits each month across their locations to ensure the standards they require are being met.
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