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: How old was Sir Lyell when Carpenter met him? Passage 1:In 2000, Fox made her debut for the Glyndebourne Festival as Karolka (Jenufa), returning in 2002 as Zerlina (Don Giovanni) and in 2003 as Susanna (Le nozze di Figaro). Of her Susanna in Le Nozze di Figaro at the Glyndebourne Festival Barbarina Diana, writing in Il giornale della musica described her performance at Glyndebourne as "a delight for the eye and heart, whose voice, fresh and crystal clear is blessed with a rare beauty accompanied by a strong musicality: 'Deh vieni' interpreted without affectation, directed to her beloved, takes your breath away". With Glyndebourne on tour she has sung Marzelline (Fidelio) and Miss Wordsworth (Albert Herring). In 2004, she made her debut with the Royal Opera Covent Garden as Woglinde (Das Rheingold), returning to the house in 2005 as Waldvogel (Siegfried) and in 2006 as Woglinde (Gotterdammerung). In 2007 she sang Zerlina (Don Giovanni) and Woglinde (Das Rheingold and Gotterdammerung; in 2008, Lucy Lockitt in The Beggars Opera and in 2009, Asteria in Handel's "Tamerlano." Further British engagements include Ann Page (Sir John in Love) with English National Opera, Merab (Saul), Musetta and Mimi (La Boheme) with Opera North, and Servilia (La clemenza di Tito) with Welsh National Opera. At the Edinburgh Festival, her roles have included Iphis (Jephtha) and Cleofide (Poro).
Passage 2:He went into medical practice at Jackson, East Feliciana Parish, Louisiana and continued to pursue an interest in the natural sciences. In 1838, he published a study of a submerged forest he discovered near Port Hudson, East Baton Rouge Parish, Louisiana. In 1842, he was a professor of "materia medica" at the University of Louisiana, where he was appointed dean in 1845. In 1844, he published a study on the habit of dirt eating among Negro slaves, and he published several other significant studies. He was a leading proponent of research into disease transportability and transmission as related to importation of disease and outbreak of epidemics. He joined the faculty of the Medical College of Louisiana as Professor of Botany and Geology, and from 1845-1846 he was Dean of the Tulane University School of Medicine. From 1846 through 1848, he was editor of the New Orleans Medical and Surgical Journal. In early 1846, he met Sir Charles Lyell, who said of him: "His knowledge of botany and geology, as well as his amiable manners, made him a most useful and agreeable companion". His botanical collections were published posthumously and several plants were named in his honor, including the rare flowering California Bush Anemone, Carpenteria californica, which was "named in honour of Professor William M. Carpenter (1811-48), a physician from Louisiana, by its discoverer, Major General John Charles Fremont, who collected it on one of his four journeys of exploration in the extreme west of the United States between 1842 and 1848." Carpenter's Groundcherry (Physalis carpenteri Riddell, 1853 ex Rydberg, 1896), a plant in the nightshade family indigenous to Louisiana, and Carpenter's Oak, Quercus carpenteri Riddell, 1853, also indigenous to Louisiana, were named in his honor by fellow naturalist John Leonard Riddell.
Passage 3:The Battle of Chongju (2930 October 1950) took place during the United Nations Command (UN) offensive towards the Yalu River, which followed the North Korean invasion of South Korea at the start of the Korean War. The battle was fought between Australian forces from 3rd Battalion, Royal Australian Regiment (3 RAR) and the 17th Tank Brigade of the Korean People's Army (KPA) for control of Chongju, North Korea and the surrounding area. After detecting a strong KPA armoured force equipped with T-34 tanks and SU-76 self-propelled guns on a thickly wooded ridgeline astride the line of advance, the Australians launched a series of company attacks with American M4 Sherman tanks and aircraft in support. Despite heavy resistance the KPA were forced to withdraw and the Australians captured their objectives after three hours of fighting.
2