Question: How old was the player who signed with Sunderland on September 8th, at the time of the signing? Passage 1:Li made his professional opera debut in 2011 with the SFO as Le Dancaïre in Georges Bizet's Carmen. His subsequent appearances with the SFO include Ascanio Petrucci in Lucrezia Borgia (2011), Lorenzo in I Capuleti e i Montecchi (2012), Sciarrone in Tosca (2012), The Indian Gardener / Ben Weatherstaff in the world premiere of Nolan Gasser's The Secret Garden (2013), and both Fiorello and Don Basilio in The Barber of Seville (2013). He was also a featured soloist in a 2013 concert honoring mezzo-soprano Zheng Cao at the San Francisco War Memorial and Performing Arts Center. He has also appeared at the Seoul Arts Centre in Korea as Gremin in Eugene Onegin, and appeared in that same opera as the Captain of the Guards at the National Centre for the Performing Arts in Beijing in 2014. In 2015 he created the role of Male Soloist No. 4 in the world premiere of Huang Ruo's Paradise Interrupted at the Spoleto Festival USA.
 Passage 2:In 1809, Walter Coffin sunk the first coal pit in the Rhondda, further up the valley in Dinas, but a lack of a transportation network greatly affected the profitability of coal mining as an industry in the region. Coffin tackled this problem by constructing a one-mile tramline which connected his mines in Dinas to a tramline built by Dr. Richard Griffiths at Denia (Pontypridd), which linked to a private canal that joined onto the Glamorganshire Canal at Treforest. Coffins tramline followed the southern bank of the River Rhondda and ran through Porth. The existence of the tramline made the development of the Porth and Cymmer region far more attractive, and by the middle of the 19th century there was an impetus to expand coal mining in the area. In 1841 Richard Lewis joined Coffin in trying to exploit the region with his level built at Cymmer. This resulted in the construction of around fifty miners' cottages, several of which were located in Porth. In 1844 Lewis Edwards of Newport and George Gethin of Penygraig opened a small level at Nyth-bran on the eastern borders of Porth, the villages' first coal mine. This was followed in 1845 by the sinking of the Porth Colliery by David James of Merthyr, the success of which saw him build the Llwyncelyn Colliery in 1951, also in Porth. By 1850 the Taff Vale Railway had been extended to Cymmer replacing the tramline, allowing direct access between the lower Rhondda and the ports of Cardiff.
 Passage 3:Sunderland opened the month with a 1–0 defeat away to Manchester United on 1 September, Louis Saha scored the winner 18 minutes from full-time. Roy Keane said "I'm delighted with the overall performance. It would have been nice to test their goalkeeper a bit more but overall I'm delighted with the players' efforts." about the team's display. Jack Pelter signed for Sunderland on 8 September, from New Zealand team Canterbury United, on a free transfer in an original one-month deal. Two weeks after the defeat to Manchester United, Sunderland beat Reading 2–1 on 15 September. Kenwyne Jones and Ross Wallace scored the Sunderland goals in a game which was overshadowed by the tribute paid to 1973 FA Cup Final scorer Ian Porterfield who died on 11 September 2007. Sunderland met Middlesbrough on 22 September in their first north east derby of the season. Grant Leadbitter scored in the 2nd minute to put Sunderland in front, but two ex-Sunderland players; Julio Arca and Stewart Downing put Middlesbrough into the lead. Liam Miller scored an 89th minute volley to save a point for Sunderland. Grant Leadbitter scored his second goal in as many games on 29 September as Blackburn Rovers beat Sunderland 2–1.

Output: 3