Definition: In this task, you're given a short article. Your job is to classify the article based on its category. Use the following classification labels, 0. World, 1. Sports, 2. Business, 3. Science or Technical. Label the text "0" if it contains information related to world. Label the text "1" if it contains information related to sports. Label the text "2" if it contains information related business. Label the text "3" if it contains science or technical related information. 
Input: Calpine Accounts Questioned  NEW YORK (Reuters) - Calpine Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CPN.N target=/stocks/quickinfo/fullquote"&gt;CPN.N&lt;/A&gt; has been  struggling badly ever since the Enron Corp. collapse in 2001  exposed the weaknesses of its power generation and trading  business, but a recent study of its accounts suggests worse may  still be to come.
