You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are given a sentence and a question in the input. The information provided in the sentence should be enough to answer the question. You're expected to write the correct answer. Do not use any facts other than those provided in the sentence.

Sentence: GOP leaders submitted the new offer Tuesday afternoon in an effort to appease Democrats, whose votes are needed to avert a shutdown of federal agencies, several House and Senate aides said. Question: Who has to be appeased to keep the government open?
Solution: Democrats.
Why? The sentence says that "Democrats" have to be appeased, which answers the question.

New input: Sentence: The city has a rich history, spanning nearly 2000 years, as inferred from inscriptions found in the valley. 
Question: What suggests that Kathmandu is as old as it is?
Solution:
Inferences from inscriptions found in the valley.