Question: When did Coop, the owner of the largest supermarket chain in Italy, launch CoopVoce?

Context paragraphs:
Coop (Italy): Coop is a system of Italian consumers' cooperatives which operates the largest supermarket chain in Italy.  Its headquarters are located in Casalecchio di Reno, Province of Bologna.

Food-a-rama: Food-A-Rama was a Baltimore, Maryland based supermarket chain of 48 stores.  The stores were located in Maryland and Washington, DC.  They consisted of Food-A-Rama, Super-Super, Cost-Saver Warehouse, and Basics Food Warehouse stores.  When the company was sold in 1985 to Super Rite Foods of PA, it was the second largest supermarket chain in Baltimore, MD behind Giant Food.  After the sale, stores were bought and sold eventually changing all the store banners to Metro Food Markets.  Super Rite and Basics/Metro Food Markets were acquired by Richfood Holdings in 1995.  Richfood Holdings was sold to Supervalu Inc.  in 1999.  Supervalu has since folded Metro Food Markets into the Shoppers Food Warehouse chain based in Lanham, MD.

Sainsbury's Freezer Centres: Sainsbury's Freezer Centres was a former frozen food chain, operated by the then-largest UK supermarket chain (now the second largest supermarket chain) Sainsbury's.

Masoutis: Masoutis (Greek: "Μασούτης") is a supermarket chain in Greece.  Its headquarters are located in Thessaloniki.  The company was established in 1976 by Diamantis Masoutis - who still owns the company - and the first Masoutis supermarket opened its doors the same year in Thessaloniki city center.  Masoutis is by far the biggest regional grocery retail chain in Greece.  Actually, Masoutis is the seventh largest supermarket chain in Greece in terms of market share.  As of 2010, the company has a total of 193 retail stores and 17 cash & carry.  All of them are located in Northern Greece and Northeastern Aegean.  The company currently has no plans of expanding into either Southern Greece or the Greek islands.

CoopVoce: CoopVoce is an Italy-based Mobile virtual network operator launched on June 1, 2007 by the owner Coop and based on Telecom Italia Mobile GSM/GPRS network.

Carlos González Nova: Carlos González Nova (August 14, 1917 - August 19, 2009) was a Mexican businessman who co-founded the Comercial Mexicana supermarket chain in 1930.  Comercial Mexicana is the third largest supermarket chain in Mexico as of 2009.

Denner (supermarkets): Denner is a discount supermarket chain in Switzerland.  It is Switzerland's third largest supermarket chain after Migros and Coop with 11.4% market share.  It is owned by the Federation of Migros Cooperatives since 2007.

Hatzi Hinam: Hatzi Hinam or Hetzi Hinam (Hebrew: חצי חינם‎ ‎ , "lit."  half-free, from Hebrew: בחצי חינם‎ ‎ , "very cheaply") is a supermarket chain in Israel.  Founded in the early 1990s, the regional independent supermarket chain is headquartered in Holon, and has seven stores in the Gush Dan area.  Hatzi Hinam is the fourth largest supermarket chain in Israel, with a market share of over 5% but has significantly fewer stores than the two major Israeli chains.  In 2004, the company had an estimated NIS1.1 billion in sales and was confirmed the largest independent supermarket chain.  Cousins Zaki Shalom and Mordechai Kuperly share ownership (67%/33%) of the chain.

Atlantic (supermarkets): Atlantic (Greek: Ατλάντικ ) was a large supermarket chain in Greece.  Atlantic supermarkets were founded in 1980 by Panayiotis Apostolou.  Up to 1985 the company was a small chain with just 5 stores.  After 1985 the company expanded rapidly through both organic growth and a number of acquisitions and takeovers.  Atlantic was a public company and its shares used to trade in the Athens Stock Exchange from 2000 up to 2010.  As of 2006–2007, the company had 182 stores nationwide and was the fifth largest supermarket chain in Greece as measured by market share.  The company had also operated a franchise network of smaller stores branded "ARISTA".  Since 2009 the company had suffered from serious financial difficulties (mainly due to excessive borrowing) and eventually (in 2011) went into liquidation.  The company ceased all trading as of 3 August 2011.

Wellcome: Wellcome (; Cantonese: "Wai Hong" in Hong Kong; in Taiwan) is a supermarket chain owned by Jardine Matheson Holdings via its Dairy Farm International Holdings subsidiary.  The Wellcome supermarket chain is one of the two largest supermarket chains in Hong Kong, the other being PARKnSHOP.  Wellcome also operates supermarkets in Taiwan and the Philippines under the Wellcome name.  The parent company, Dairy Farm, also has other supermarket interests in the Asia Pacific under different brand names.

Supporting paragraphs: CoopVoce Coop (Italy)
Answer: June 1, 2007