Detailed Instructions: This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.
Q: Passage: In 2005, the Astros started poorly and found themselves with a 1530 record in late May. The Houston Chronicle had written them off with a tombstone emblazoned with "RIP 2005 Astros". However, from that low point until the end of July, Houston went 4217 and found themselves in the lead for an NL wild card spot. July saw the best single-month record in the clubs history at 22-7. Offensive production had increased greatly after a slow start in the first two months. The Astros had also developed an excellent pitching staff, anchored by Roy Oswalt (2012, 2.94), Andy Pettitte (179, 2.39), and Roger Clemens (138 with a league-low ERA of only 1.87). The contributions of the other startersBrandon Backe (108, 4.76) and rookie starters Ezequiel Astacio (36, 5.67) and Wandy Rodriguez (1010, 5.53)were less remarkable, but enough to push the Astros into position for a playoff run. The Astros won a wild card berth on the final day of the regular season, becoming the first team since the world champion 1914 Boston Braves to qualify for the postseason after being 15 games under .500.
Question: How many more wins did Roy Oswalt have compared to Roger Clemens?
Answer type: Number
A:
7.