Question: When was the American clothing and accessories retailer founded which headquartered is in the Southside Works Neighborhood of Pittsburgh and  Sacha M'Baye has modeled for it?

Context paragraphs:
Hobbs Ltd: Hobbs is a women’s clothing, footwear and accessories retailer based in London, UK.  It was founded in Hampstead in 1981 and began as a shoe retailer.  Hobbs now has stores across the United Kingdom and concession stores in the United States and Germany.  The online store serves 55 countries worldwide.  Hobbs is popularly associated with clothing priced in the mid range for a customer base that is largely middle-aged and older.  Among its best-known customers are the Duchess of Cambridge and her sister, Pippa Middleton.

Chico's (clothing retailer): Chico's is a retail women's clothing chain founded in 1983 by a three-person operation on Sanibel Island, Florida.  Chico's FAS, Inc. is an American women’s clothing and accessories retailer.  The company was founded by Marvin and Helene Gralnick and is headquartered in Ft. Myers, Florida.  Chico's FAS operates three brands: its namesake Chico's, White House | Black Market and Soma.  As of November 1, 2014, Chico's FAS operated 1,557 women's clothing stores in the US and Canada and sold merchandise through franchise locations in Mexico.

OKA Direct: OKA (also known as OKA Direct) is a British furniture and home accessories retailer founded in 1999 by Annabel Astor, Sue Jones and Lucinda Waterhouse.  OKA now has 14 shops across the UK together with British, European and American websites and a catalogue business.

Charles &amp; Keith: Charles & Keith (styled CHARLES & KEITH) is an international fast-fashion footwear and accessories retailer founded in 1996 by Charles Wong and Keith Wong.  Based in Singapore, the brand has a global footprint across Asia, the Middle East, Europe, Latin America and Africa.

County Seat (store): County Seat was an American clothing retailer founded in 1973.  With more than 740 stores at its peak, the chain closed in 1999 following Chapter 11 bankruptcy.

Vineyard Vines: Vineyard Vines is an American clothing and accessory retailer founded in 1998 in Martha's Vineyard, Massachusetts, by brothers Shep and Ian Murray.  The brand markets upper market ties, hats, belts, shirts, shorts, swimwear, bags for men, women, and children.  It has grown to a collection of retail stores and outlets across the United States.  Their clothing is considered preppy.

Sacha M'Baye: Sacha M'Baye is a French footballer and model.  He is known mainly for modelling for Burberry with Jourdan Dunn.  He has also modeled for Gap, American Eagle, Stone Island, GQ Style.  He is of French and Senegalese descent, he is signed to Select (London), Why Not (Milan) and New Madison (Paris).

Zara (retailer): Zara (] ) is a Spanish clothing and accessories retailer based in Arteixo, Galicia.  The company was founded in 1975 by Amancio Ortega and Rosalía Mera.  It is the main brand of the Inditex group, the world's largest apparel retailer.  The fashion group also owns brands such as Massimo Dutti, Pull and Bear, Bershka, Stradivarius, Oysho, Zara Home, and Uterqüe.  Zara as of 2017 manages up to 20 clothing collections a year.

American Eagle Outfitters: American Eagle Outfitters, Inc. is an American clothing and accessories retailer, headquartered in the Southside Works Neighborhood of Pittsburgh, Pennsylvania.  It was founded in 1977 by brothers Jerry and Mark Silverman as a subsidiary of Retail Ventures, Inc., a company which also owned and operated Silverman's Menswear.  The Silvermans sold their ownership interests in 1991 to Jacob Price of Knoxville, Tennessee.  American Eagle Outfitters is also the parent company of Aerie.

Banana Republic: Banana Republic is an American clothing and accessories retailer owned by American multinational corporation, Gap Inc.

Supporting paragraphs: Sacha M'Baye American Eagle Outfitters
Answer: 1977