Question: In what year was the founder of the dance group Not Your Ordinary Tappers born?

Context paragraphs:
Édouard Lock: Édouard Lock (born March 3, 1954 in Morocco) is a Canadian dance choreographer and the founder of the Canadian dance group, La La La Human Steps.

Ayodele Casel: Ayodele Casel (born June 5, 1975) is an American actress, tap dancer and choreographer.  Raised in Puerto Rico, she derived inspiration for her tap style from salsa music.  While in college, she studied with Baakari Wilder and Charles Goddertz.  She became the first, and remains the only, woman to be a member of Savion Glover's Not Your Ordinary Tappers.

Colin Connor (dancer): Colin Connor (born June 18, 1954) is a Canadian–British dancer, choreographer, and educator, based in the United States.  With over forty commissions that span the worlds of contemporary dance, ballet and flamenco.  Works draws from a large range of influences – musical, literary, social, and scientific – all used to bring attention back to the communicative power of the human body.  He frequently, collaborates with artists of other disciplines, including composers, artists, and designers.  As a choreographer, teacher and dancer, Connor is currently influencing the next generation of contemporary dancers and dance makers.  Dancers who have trained with Connor have gone on to Mark Morris Dance Group, Scapino Ballet, Hubbard Street Dance, The Limon Dance Company and others.

Shobana Jeyasingh Dance: Shobana Jeyasingh Dance is a British dance group based in London and founded in 1988 by the company's artistic director and choreographer, Shobana Jeyasingh.  The company has toured internationally including, most recently, in India, Hong Kong, Singapore, Seoul, USA, Sweden, Italy, Austria and throughout the United Kingdom (UK).  It is also a regular participant in the Dance Umbrella festival in London.  It has received three Digital Dance Awards, two Time Out Dance Awards and the London Music and Dance Award.  Its work, "Faultline", is part of the GCSE syllabus for dance in the UK.

Udabarri (dance group): The Udabarri Euskal Dantzari Taldea (Basque for "Springtime Basque Dance Group") is a dance group from Amorebieta-Etxano in the Basque Country.

Grand Union (dance group): The Grand Union was an improvisational dance group based in New York City from 1970 to 1976.  It grew out of Yvonne Rainer dance company, and her piece "Continuous Project - Altered Daily".  Rainer's sole authority as choreographer began to slip in early 1970 when the dancers, at her invitation, began to bring in their own materials for the piece.  By late 1970, new members had joined the group and the materials were improvised to a much greater extent.  The company, which was still often billed as "Yvonne Rainer and Dancers" in the beginning, chose "The Grand Union" as a name to avoid any obvious associations with dance in order to inoculate themselves against charges that what they were doing was not properly "dance".  To avoid problems with the supermarket chain of the same name, the group used the legal name "Rio Grand Union".

Savion Glover: Savion Glover (born November 19, 1973) is an American tap dancer, actor, and choreographer.

DO2dTUN: OlaDotun Ojuolape Kayode (born April 8, 1984) popularly known as DO2dTUN (pronounced "D-O-to-the-T-U-N") is a Nigerian-based media mogul, on-air personality, disk jockey, video jockey, voice-over artist, sound engineer, hype-man, voice coach and entertainment entrepreneur.  He started out his sojourn in the entertainment industry when he as an undergraduate student of the Lagos State University pioneered a dance group called Xtreme Dancers.  The group later became defunct and then he joined popular choreographer Nonso (known as Flexxx) on a dance group called IGNITE.  He pursued a career in broadcasting in 2004 when he joined Cool FM where he served as an intern for about five years before he began to host radio shows.  He has received numerous awards, including Broadcaster of the Year at the Dynamix All Youth Awards (2011), Young Radio Presenter of the Year at the 2012 Nigeria Broadcasters Merit Award, Radio Personality of the Year at The Society Awards (2011), On Air Personality of the Year at the 2015 City People Awards, and On Air Personality of the Year at the 2015 edition of the Nigerian Entertainment Awards.  He was also nominated as the Broadcaster of the year at the 2011 and 2012 editions of The Future Awards.

Ian Eastwood: Ian Anthony Eastwood (born April 16, 1993) is a dancer, choreographer and director and previous member of the dance group, Mos Wanted Crew, featured on America's Best Dance Crew.  He was featured on NBC's new TV show World of Dance as Ian Eastwood and the Young Lions.  He has also worked with The Millennium Dance Complex, Coastal Dance Rage, and Movement Lifestyle.  He appeared on Dance Showdown and Return of the Superstars.

The Lockers: The Lockers (originally named The Campbell Lockers) were a dance group formed by Toni Basil and Don "Campbellock" Campbell in 1971.  Active throughout the 1970s, they were pioneers of street dance.  Don Campbell is the founder of the locking dance style, and originally, Locking was called The Campbellock - a style that was based on the dance and song that Don Campbell created.  Toni Basil met Campbell at a club in 1971 and together they formed The Lockers as a dance group.  Toni Basil also served as The Lockers' manager, and was responsible for staging the act.  All the dancers contributed steps and choreography with their unique and individual styles.  By 1975 they were "Dancing their way to stardom" on their own.  Individual members' contributions (as soloist performers) to the dance style and group image coupled with their unique presentation in staging and concept broke down many barriers.  It has been said on the reality dance competition "So You Think You Can Dance" that "The Lockers' emergence on the dance scene changed the face of dance not only for street dancers but for dance in general and has made street dance a true American art form."

Supporting paragraphs: Ayodele Casel Savion Glover
Answer: 1973