I want to know the answer to the following question:
Heian was Japan's capital for how many years?
All the background I'm provided with is that "The early Heian period (784–967) continued Nara culture; the Heian capital was patterned on the Chinese Tang capital at Chang'an, as was Nara, but on a larger scale than Nara.". Is that enough to answer the question?
Answer: no