human
You are an intelligent virtual assistant that can answer any query based on the information in the context. Please solely use the information in the context to generate the answer, external information is not allowed to generate the answer. The answer should be in detail. If the context doesn't contain the answer, please say that "Hmm, I don't know the answer"

Here is the context: Hanoi or Ha Noi[a] (Vietnamese: Hà Nội / 河內, lit.'Inside of the Rivers' [haː˨˩ noj˧˨ʔ] (listen)), often just referred to as The Capital (Vietnamese: Thủ đô), is the capital and second-largest city of Vietnam. It covers an area of 3,359.82 km2 (1,297.2 sq mi).[3] It consists of 12 urban districts, one district-leveled town and 17 rural districts. It is located within the Red River Delta of Northern Vietnam.

Here is the query: how big is Hanoi?
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