Detailed Instructions: 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.
Q: Question: Which colleague Neugebauer collaborated with at Mount Wilson Observatory is the oldest? Passage 1:When the Qajars had succeeded in restoring the unity of Persia, the sons of the Khan were no more able to maintain their independence like the other Caucasian chiefs and had to choose between Russia and Persia. The Khan of Shirwan, Mustafa, who had already entered into negotiations with Zubov, submitted to the Russians in 1805, who occupied the Persian cities of Derbend and Baku the next year (1806) during the Russo-Persian War (1804-1813), but soon afterwards he made overtures to the Persians and sought help from them. By the Treaty of Gulistan (12/24 October 1813) following the end of the 1804-1813 war, Persia was forced to cede its territories and regions comprising Darband, Quba, Shirwan and Baku, while giving up all claims on them as well. Nevertheless, Mustafa continued to have secret dealings with Persia. It was not until 1820 that his territory was occupied by Russian troops; the Khan fled to Persia and Shemakha was irrevocably incorporated in Russian territory. Iranian anger while being dissatisfied with losing swaths of its integral territories in the North and South Caucasus subsequently sparked the Russo-Persian War (1826-1828), which resulted in another Iranian loss, as well as the ceding of its last remaining territories in the Caucasus comprising what is now Armenia, and southern parts of the contemporary Republic of Azerbaijan. The Treaty of Turkmenchay of 1828 officially ratified the forced ceding of these Iranian territories to Imperial Russia, while it would also mark the official end of millennia long intertwined Iranian hegemony, rule, and influence over the Caucasus region, including Shirvan.
 Passage 2:Neugebauer was active in infrared astronomy, and played a leading role in infrared studies of the planets. In addition—and largely through his activities with the Infrared Astronomical Satellite (IRAS) and the Infrared Processing and Analysis Center (IPAC)—he led both ground- and space-based infrared studies of the stars, the Milky Way and other galaxies. Observations by him and his colleagues at Mount Wilson and Palomar observatories revealed thousands of infrared sources in the sky, and afforded the first infrared view of the galactic center. Together with Robert B. Leighton, he completed the Two-Micron Sky Survey, the first infrared survey of the sky, which cataloged more than 5,000 infrared sources. Together with Eric Becklin, he discovered the Becklin–Neugebauer Object, an intense source of infrared radiation in the Orion Nebula that is one of the brightest objects in the sky at wavelengths less than 10 micrometres.
 Passage 3:Taube was born in New York City in 1939 to Count Arvid E. Taube and Alice N. Taube. After attending Kent School, he enrolled at Princeton University, from which he graduated in 1961 with a B.A. in sociology. He went on to receive a doctorate in sociology from American University in 1983. He began working at the National Institute of Mental Health in 1961 as a statistician, and continued to work there until 1987, eventually becoming director of their Division of Biometry and Applied Sciences. He also began a mental health economics program at the NIMH and started their "Mental Health, United States" series, a regularly published report cataloging mental health statistics in the United States. In 1980, he was awarded the Administrators Award for Meritorious Achievement from the Alcohol Drug Abuse and Mental Health Agency. In 1987, he became a professor in the Department of Mental Hygiene at the Johns Hopkins School of Hygiene and Public Health, where he continued to teach until his death. On September 28, 1989, he died of congestive heart failure at the Johns Hopkins Hospital in Baltimore, Maryland. In 1990, the American Public Health Association established the Carl Taube Award for Lifetime Contribution to the Field of Mental Health in honor of his work.

A:
2