Q: 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: Of the two players that each won three titles, are either still playing? Passage 1:Natural strontium is a mixture of four stable isotopes: Sr, Sr, Sr, and Sr. Their abundance increases with increasing mass number and the heaviest, Sr, makes up about 82.6% of all natural strontium, though the abundance varies due to the production of radiogenic Sr as the daughter of long-lived beta-decaying Rb. Of the unstable isotopes, the primary decay mode of the isotopes lighter than Sr is electron capture or positron emission to isotopes of rubidium, and that of the isotopes heavier than Sr is electron emission to isotopes of yttrium. Of special note are Sr and Sr. The former has a half-life of 50.6 days and is used to treat bone cancer due to strontium's chemical similarity and hence ability to replace calcium. While Sr (half-life 28.90 years) has been used similarly, it is also an isotope of concern in fallout from nuclear weapons and nuclear accidents due to its production as a fission product. Its presence in bones can cause bone cancer, cancer of nearby tissues, and leukemia. The 1986 Chernobyl nuclear accident contaminated about 30,000 km with greater than 10 kBq/m with Sr, which accounts for 5% of the core inventory of Sr.
 Passage 2:Before this year, the tournament was won by a home favorite on several occasions: Guy Forget in 1996, Fabrice Santoro in 1999, Arnaud Clément in 2006, and Gilles Simon in 2007. The record for most titles is three, won by the Swiss player Marc Rosset in its first two years in 1993 and 1994, as well as in 2000; the Swedish player Thomas Enqvist also won three, in 1997, 1998, and 2002. It is also one of the few ATP tournaments to have been won only by European players, with France with five (Forget, Santoro, Clément, Simon, and this year's winner Jo-Wilfried Tsonga), Sweden with 4 (Enqvist, Joachim Johansson), Switzerland with four (Rosset, Roger Federer), Germany with one (Boris Becker), Russia with one (Yevgeny Kafelnikov), Slovakia with one (Dominik Hrbatý), and Great Britain with one (Andy Murray).
 Passage 3:On a smuggling run from Colombia, having dumped packages of cocaine off near Blairsville, Georgia, Thornton jumped from his auto-piloted Cessna 404. In the September 11, 1985, jump, he was caught in his parachute and ended up in a free fall to the ground. His dead body was found in the back yard of Knoxville, Tennessee, resident Fred Myers. The plane crashed over away in Hayesville, North Carolina. At the time of his death Thornton was wearing night vision goggles, a bulletproof vest, Gucci loafers, and a green army duffel bag containing approximately 40 kilos (88 lbs.) of cocaine valued at $15 million, $4,500 in cash, six . gold Krugerrands, knives, and two pistols. Three months later, a dead black bear was found in the Chattahoochee National Forest that had apparently overdosed on cocaine dropped by Thornton.

A:
2