Question: The Center for UFO Studies (CUFOS) is a privately funded UFO research group, founded in which year by J. Allen Hynek?

Context paragraphs:
Fund for UFO Research: The Fund for UFO Research (FUFOR) was a UFO research group based in Alexandria, Virginia.  Founded in 1979, FUFOR stated its goal was to further the scholarly research of UFOs and the extraterrestrial hypothesis (ETH), and to secure the release of alleged classified U.S. government documents pertaining to these.  Since 2011, the Fund for UFO Research has not had any active presence on the internet or in print.

Allan Hendry: Allan Hendry (born 1950) is an American astronomer and ufologist.  UFO historian Jerome Clark calls him "one of the most skilled investigators in the history of UFO research."  He was the main investigator for the Center for UFO Studies (CUFOS) in the 1970s.

Aerial Phenomena Research Organization: The Aerial Phenomena Research Organization (APRO) was an UFO research group started in January 1952 by Jim and Coral Lorenzen, of Sturgeon Bay, Wisconsin.

J. Allen Hynek: Dr. Josef Allen Hynek (May 1, 1910 – April 27, 1986) was an American astronomer, professor, and ufologist.  He is perhaps best remembered for his UFO research.  Hynek acted as scientific advisor to UFO studies undertaken by the U.S. Air Force under three consecutive projects: Project Sign (1947–1949), Project Grudge (1949–1952), and Project Blue Book (1952–1969).

Michael D. Swords: Michael D. Swords is a retired professor of Natural Science at Western Michigan University, who writes about general sciences and anomalous phenomena, particularly parapsychology, cryptozoology, and ufology, editing the academic publication "The Journal of UFO Studies".  He is a board member of the J. Allen Hynek Center for UFO Studies.

Center for UFO Studies: The Center for UFO Studies (CUFOS) is a privately funded UFO research group.  The group was founded in 1973 by J. Allen Hynek, who at the time was the Chair of the Department of Astronomy at Northwestern University in Illinois.

Wisconsin Institutes for Discovery: The Wisconsin Institutes for Discovery is a public-private biomedical research partnership that is located on the University of Wisconsin–Madison campus.  It consists of two institutions: the privately funded Morgridge Institute for Research, and the publicly funded Wisconsin Institute for Discovery.  Both institutes opened in 2010.  The publicly funded institute is headed by David Krakauer, and the privately funded institute is led by chief executive officer Brad Schwartz.  Jo Handelsman has been appointed as Director of the Wisconsin Institutes for Discovery, effective on February 1, 2017.

Istanbul UFO Museum: Istanbul UFO Museum (Turkish: "İstanbul Uluslararası UFO Müzesi" ) is the fourth international UFO museum, and is located in the Beyoğlu district of Istanbul, Turkey.  Founded by Haktan Akdoğan's "Sirius UFO Space Sciences Research Center" in 2001, the museum contains various photos, videos, reports, UFO-alien models, and a library about UFO's and extraterrestrial life.

Felix Ziegel: Felix Yurievich Ziegel (Russian: Феликс Юрьевич Зигель , March 20, 1920 - November 20, 1988) was a Soviet researcher, Doctor of Science and docent of Cosmology at the Moscow Aviation Institute, author of more than forty popular books on astronomy and space exploration, generally regarded as a founder of Russian ufology.  Ziegel, the co-founder of the first officially approved Soviet UFO research group, became an overnight sensation when, on November 10, 1967, speaking on the Soviet central television, he made an extensive report on the UFO sightings registered in the USSR and encouraged viewers to send him and his colleagues first-hand accounts of their observations, which resulted in barrage of letters and reports.  He died in November 1988, leaving 17 volumes of the unpublished research documents for his daughter to keep.

Close encounter: In ufology, a close encounter is an event in which a person witnesses an unidentified flying object.  This terminology and the system of classification behind it was started by astronomer and UFO researcher J. Allen Hynek, and was first suggested in his 1972 book "The UFO Experience: A Scientific Inquiry".  He introduced the first three kinds of encounters; more sub-types of close encounters were later added by others, but these additional categories are not universally accepted by UFO researchers, mainly because they depart from the scientific rigor that Hynek aimed to bring to ufology.

Supporting paragraphs: Center for UFO Studies J. Allen Hynek
Answer: 1973