You will be given a definition of a task first, then some input of the task.
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 Nusslein-Volhard when she won the Nobel Prize in Physiology and Medicine? Passage 1:The concept of the morphogen has a long history in developmental biology, dating back to the work of the pioneering Drosophila (fruit fly) geneticist, Thomas Hunt Morgan, in the early 20th century. Lewis Wolpert refined the morphogen concept in the 1960s with the French flag model, which described how a morphogen could subdivide a tissue into domains of different target gene expression (corresponding to the colours of the French flag). This model was championed by the leading Drosophila biologist, Peter Lawrence. Christiane Nusslein-Volhard was the first to identify a morphogen, Bicoid, one of the transcription factors present in a gradient in the Drosophila syncitial embryo. She was awarded the 1995 Nobel Prize in Physiology and Medicine for her work explaining the morphogenic embryology of the common fruit fly. Groups led by Gary Struhl and Stephen Cohen then demonstrated that a secreted signalling protein, Decapentaplegic (the Drosophila homologue of transforming growth factor beta), acted as a morphogen during the later stages of Drosophila development.
 Passage 2:Sefer ha-Mizrachi is a supercommentary on Rashi's commentary on the Torah. It is counted in its own right as among the most important commentaries on the Torah. It was first published in Venice in 1527 after Mizrachi's death, by his son Israel. Mizrachi himself considered his commentary on Rashi the most important of his works (Responsa, Nos. 5, 78). The work shows Rashi's Talmudic and midrashic sources, and elucidates all obscure passages. It was written, partially, to defend Rashi from the strictures of the later commentators, particularly Nachmanides. A compendium by Jacob Marcaria was published under the title Kitzur Mizrachi (Trento, 1561), and later, one by Isaac ha-Kohen of Ostroh, entitled Mattenat 'Ani (Prague, 1604-9). Several commentaries have been written on Mizrachi, including Yeri'ot Shlomo by Solomon Luria (Maharshal), a supercommentary on Sefer ha-Mizrachi by Barzillai ben Baruch Jabez, and strictures on the work by Samuel Edels, (Maharsha).
 Passage 3:Several archaeological finds on the territory of Woluwe-Saint-Lambert show traces of human activity during the Bronze Age. The first historical mention of the village, however, dates from the 11th century, when some of the forested land near the Woluwe River was cleared for farming. A church was built and dedicated to Saint Lambert, the 7th-century bishop of Maastricht who was martyred in Liège. At the end of the 12th century, the rights to the parish of Saint Lambert were given to the canons of the chapter of St. Michael and Gudula in Brussels. Various charitable organizations and hospitals then started acquiring land in this area. Throughout the Middle Ages, Woluwe was part of the Duchy of Brabant, governed under the usual feudal arrangement of those times. Among the Dukes' vassals were some powerful local lords and landowners. Some of Woluwe's territory also belonged to the powerful Forest Abbey (Vorst in Dutch) and Park Abbey.

Output:
1