Question: What is one of the reasons experts believe contributed to the volatilaty in oil prices in 2008?
Sentence: Experts debate the causes, with some attributing it to speculative flow of money from housing and other investments into commodities, some to monetary policy, and some to the increasing feeling of raw materials scarcity in a fast-growing world, leading to long positions taken on those markets, such as Chinese increasing presence in Africa.
Answer in sentence: yes