Question: When did Time Out, the British Travel Magazine the works in which Roger Perry is best known for, start its publication?

Context paragraphs:
Time Out (magazine): Time Out is British travel magazine published by Time Out Group.  "Time Out" started its publication in 1968 and has expanded its editorial recommendations to 108 cities worldwide.

Sarah Lloyd: Sarah Lloyd (born 1947) is a British travel writer, best known for her nonfiction books "An Indian Attachment" (1984) and "Chinese Characters" (1987).

The Sunday Times Travel Magazine: The Sunday Times Travel Magazine is a monthly British travel magazine.  Although part of the same company (News UK) as the weekly The Sunday Times travel section, its content is entirely different.  The magazine publishes travel information, features, competitions, offers, and photography.  It was established in February/March 2003 as a bi-monthly magazine, changing to a monthly frequency in 2005.  s of 2014 , the magazine has a limited online presence, with less than 5% of its content available to view online.  The remaining 95% is published exclusively in print.

Roger Perry (photographer): Roger Perry (1944 - 1991) was an English photographer, best known for his work at Time Out, as well as The Sunday Times and The Observer colour magazines.  His 1976 book of London graffiti photography "The Writing on The Wall" (with an introduction by George Melly) was one of the first extensive surveys of the city's burgeoning 'scene'.

British Columbia Magazine: British Columbia Magazine is a geographic and travel magazine in British Columbia.  Its coverage includes independent travel, outdoor exploration and recreation, geography, wildlife, conservation, people, science and natural phenomena, First Nations culture, heritage places, and history within the province, with a tradition of extensive use of photography.  Founded in 1959 as "Beautiful British Columbia" magazine, the publication is currently owned by OP Media Group.

Dan Kieran: Dan Kieran (born 10 June 1975) is a British travel writer, humorist, literary editor and entrepreneur.  He is best known for his travel books and for his role as deputy editor of "The Idler" between 2000 and 2010.  He is also a CEO and co-founder (with John Mitchinson and Justin Pollard) of the publishing company Unbound.

Electronic visa (evisa) to Azerbaijan: Foreign travellers must obtain a visa to travel to Azerbaijan.  Azerbaijan simplified electronic visa system for stateless persons and citizens of designated countries in January 2017.  The system is called ASAN Visa (evisa.gov.az) and the visas are issued for a single-entry visit up to 30 days.  Azerbaijan e-visa system is rated as the easiest visa to get in the world by British travel magazine, Wanderlust magazine.

Ma Thanegi: Ma Thanegi (Burmese: မသိင်္ဂီ ; born 1946) is a Burmese writer, best known for her numerous English works on various Burmese topics, including travel, history and cuisine.  She is a contributing editor to the "Myanmar Times" and editor of "Enchanting Myanmar", a travel magazine.  She is also an English translator, having translated the works of Khin Hnin Yu and other Burmese writers into English.

Cruise International: Cruise International is a British consumer travel magazine, the only British travel magazine sold on the newsstand dedicated to cruise holidays, and website.

Wanderlust (magazine): Wanderlust is a British travel magazine, covering adventurous, cultural and special interest travel.  It is published ten times a year.  It was established in Windsor, Berkshire in 1993 by Paul Morrison and Lyn Hughes, who had observed the absence of a publication combining their interests in wildlife, activities and cultural insights.  Morrison died in December 2004 and Hughes took on the roles of publisher, managing director and editor-in-chief.  In 2008, the Haymarket Media Group bought a stake in the business.

Supporting paragraphs: Roger Perry (photographer) Time Out (magazine)
Answer: 1968