Task: Question Generation
Input (English): The New Haven Green is the site of many free music concerts, especially during the summer months. These have included the New Haven Symphony Orchestra, the July Free Concerts on the Green in July, and the New Haven Jazz Festival in August. The Jazz Festival, which began in 1982, is one of the longest-running free outdoor festivals in the U.S., until it was canceled for 2007. Headliners such as The Breakfast, Dave Brubeck, Ray Charles and Celia Cruz have historically drawn 30,000 to 50,000 fans, filling up the New Haven Green to capacity. The New Haven Jazz Festival was revived in 2008 and has been sponsored since by Jazz Haven.
Output (English): In general how many people attend these music concerts?