Task: Question Answering
Input (English): Passage: After hauling in a 34-yard completion from Tony Romo mid-way though the third quarter, Cowboys TE Jason Witten surpassed 10,000 receiving yards for his career, making him only the 3rd tight end in NFL history to do so. Witten's 59-yard day against the Texans left him just 46 yards shy of the No. 2 position currently held by Shannon Sharpe with 10,060 career receiving yards. Tony Gonzalez leads all tight ends in career receiving yards at 15,127, respectively. The Cowboys four-game winning streak was their first since 2011, and their best start since 2008. 
Question: The Cowboys four-game winning streak was their greatest since? 
Answer type: Number 
Output (English): 2008.