Given the task definition and input, reply with output. In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.

Question: What geological process forms the type of stone that the dressings of the hall are made of? Passage 1:Ince Blundell Hall is in Georgian style. It is constructed in brick with sandstone dressings, and has an L-shaped plan. The main block faces southeast; it is in two storeys with an attic, and has a front of nine bays. Richard Pollard and Nikolaus Pevsner describe the front as being in late English Baroque style, and consider that it was "evidently inspired" by the front of Buckingham Palace, London. Between the upper storey and the attic is an entablature with a cornice and a panelled parapet. The central three bays project forward, the lower storeys are flanked by pairs of giant pilasters, and at the sides of the central doorway are giant columns. There are more pilasters at the ends of the building, and in the central three bays of the attic. All the pilasters and columns are Corinthian in style. The windows are sashes and are surrounded by architraves. The ground floor windows in the central bays have segmental heads with keystones, and those in the outer bays have friezes and pediments carried on consoles. Below the upper floor windows are panelled aprons and consoles. The central doorway has a segmental head and a keystone carved with the Blundell arms. At the corners of the front are quoins.
 Passage 2:Early in the second quarter, Steelers receiver Andre Hastings returned a punt 12 yards to the Bills 43-yard line, setting up Norm Johnson's 45-yard field goal. Now facing a 17-0 deficit, the Bills offense self-destructed on their next drive. Facing 3rd and 8, Jim Kelly was sacked by linebacker Kevin Green and fumbled the ball. Center Kent Hull recovered the fumble for Buffalo, but it didn't help much. On the next play, Lee Flowers stormed into the backfield and tackled punter Chris Mohr on the Bills 12-yard line, leading to another Johnson field goal that gave Pittsburgh a 20-0 lead. Buffalo responded with a drive to the Steelers 30-yard line, only to lose the ball when Lake forced a fumble from Thurman Thomas that was recovered by defensive back Chris Oldham. However, the Bills soon got the ball back with excellent field position after Rohn Stark punted the ball 33 yards to the Steelers 49. Kelly then got the team to the 1-yard line with three completions, hitting Tony Cline for 17 yards, Andre Reed for 5, and Steve Tasker for 26. Thomas then ran the ball into the end zone, cutting the score to 20-7. Only 45 seconds remained in the half, but O'Donnell proved up to the challenge of earning his team some more points, completing 4 consecutive passes for 53 yards to get the team to the Bills 16-yard line. Johnson finished the drive with his third field goal, giving the Steelers a 23-7 halftime lead.
 Passage 3:Surtees was formed by John Surtees after he left BRM to start his own team. He bought a McLaren M7C so that he could use it until the TS7 was ready. The car made its debut at the 1970 British Grand Prix with Surtees driving. He qualified 19th and retired with an oil pressure failure. In Germany, Surtees qualified 15th and was classified in ninth, although his race ended in an engine failure. The Austrian Grand Prix saw Surtees qualify 12th and retire when his engine blew. In Italy, the Englishman qualified 10th and retired when an electrical failure stalled the car at the start. The Canadian Grand Prix saw Surtees qualify and finish fifth. The team owner was joined by Derek Bell as a driver for the United States Grand Prix. Surtees qualified eighth and Bell 13th. The 1964 World Champion retired when his engine blew and Bell finished sixth. In Mexico, the team only entered Surtees. He qualified 15th and finished eighth.
1