Question:  Catriona Millar's first solo exhibition at the Dundas Street Gallery caught the attention of the co-founder of what ad agency?

Context paragraphs:
Charles Saatchi: Charles Saatchi ( ; Arabic: تشارلز ساعتجي‎ ‎ ; born 9 June 1943) is an Iraqi-British businessman and the co-founder with his brother Maurice of advertising agency Saatchi & Saatchi.  The brothers led the business – the world's largest advertising agency in the 1980s – until they were forced out in 1995.  In the same year, the brothers formed a new agency called M&C Saatchi.

The Crossways, Toronto: The Crossways is a mixed-use residential/commercial complex in the west end of Toronto, Ontario, Canada, located at 2350 Dundas Street West (The Crossways A) and 2360 Dundas Street West (The Crossways B), at the northeast corner of the intersection of Bloor Street West and Dundas Street West.  It stretches across most of a city block.

Randolph Street Gallery: Randolph Street Gallery (RSG) was an alternative exhibition space in Chicago, Illinois, from 1979 until its closing in 1998 and a vital local force in the development of a variety of new art forms and the contemporary national and international arts milieu.  Founded by two artists, Tish Miller and Sarah Schwartz, RSG began in Schwartz's living room, later moving to 853 W. Randolph Street on Chicago's west side.  The late 1970s, was a period when young artists in all disciplines were collectively founding visual and performing art organizations as alternatives to mainstream and commercial venues in many US cities.  RSG was one of more than a dozen 'alternative' galleries - along with many new 'alternative' theatre groups - situated on the near north and west sides of Chicago.  The gallery’s focus was on the needs of artists and practitioners who created work that was unsupported, or at the time, perceived to be unsupportable by most commercial or institutional funders.  Randolph Street Gallery was also the locus for groundbreaking collaborative projects such as The File Room: An Archive on Cultural Censorship, conceived by Antoni Muntadas, and was the publisher of P-Form: Performance Art Magazine.

Little Portugal, Toronto: Little Portugal (also known as Portugal Village (Portuguese: "Pequeno Portugal" / "aldeia Portugal") is a neighbourhood and ethnic enclave in Toronto, Ontario, Canada.  It is located west of downtown in the "Old" City of Toronto.  It is bound on the west by Lansdowne Avenue, on the north by College Street, on the east by Bathurst Street and on the south by the Go Transit and Union Pearson Express railway tracks.  The area is mainly residential, with Portuguese businesses along Dundas Street West and College Street.  The area west of Dufferin Street was a part of the former Town of Brockton.  The area to the east of Dufferin and south of Dundas Street is also known as "Beaconsfield Village" dating back to the days of the sub-division of lots in the area around Beaconsfield Avenue.

Martin Wilson (artist): Martin Wilson is a visual artist, based in Newcastle, New South Wales, Australia.  A graduate of the National Art School in Sydney in 1994, Martin works primarily in painting and textile media.  Among his most prominent works is "The Fuzzy Prime Ministers" – a series of latch-hook rug portraits of each Prime Minister of Australia.  The series was created to mark Australia’s Centenary of Federation in 2001 and was exhibited at Object Gallery in Sydney during the Sydney Festival, the National Portrait Gallery (Australia) in Canberra and regional art galleries throughout Australia.  Following his election in November 2007, a portrait of Kevin Rudd – the 26th in the series – was first shown at the Flinders Street Gallery in Sydney.  Martin’s other major works include "Blue Budgie on Pink" (2003) and "Raw Prawn" (2007).  In April 2009 at the University of Newcastle Gallery, Martin presented "Post" (2009), a series of rug portraits of Australia Post workers for the "Making Our Times" exhibition, which he also co-curated with Jason Martin of the Flinders Street Gallery.  Martin has exhibited extensively in artist-run spaces in Newcastle, Melbourne and Brisbane and was co-founder and co-director of Newcastle artist-run space Rocketart from 1999 to 2004.

Alexandra Park, Toronto: Alexandra Park is a neighbourhood located in downtown Toronto, Ontario, Canada.  Alexandra Park is bounded by Dundas Street West on the north, Spadina Avenue on the east, Queen Street West on the south, and Bathurst Street on the west.  Alexandra Park consists of private and public housing, with at grade retail along Queen Street West and Spadina Avenue, some institutional, and several commercial buildings scattered through the neighborhood.  The neighborhood takes its name from Alexandra Park, a municipal park at the south-east corner of Dundas Street West and Bathurst Street.  The park is named for Queen Alexandra, wife of King Edward VII, the first future monarch to visit Toronto.

Atrium on Bay: Atrium (formally known as "Atrium on Bay") is a large 1,000,000 sqft retail and office complex in Toronto, Ontario, Canada.  Atrium is located adjacent to the highly popular Yonge-Dundas Square, and was built upon the former site of the historic Ford Hotel Toronto, on the north side of Dundas Street West, extending from Yonge Street to Bay Street.  The mixed-use building was constructed in 1981 with parking on the second and third underground levels and retail space street and concourse levels topped by an eight-storey office block that rises to 14 floors on the east end of the site and 13 on the west.  It incorporates a historic bank façade at its southwest corner.  As part of downtown Toronto's PATH network, Atrium's Concourse Level is directly connected underground to the Dundas subway station, the Toronto Eaton Centre south, across on Dundas Street, and the Toronto Coach Terminal located west, across Bay Street.

Catriona Millar: Catriona Millar (born 23 January 1956) is a Scottish figurative painter born in Milngavie, Glasgow.  She studied at Grays School of Art, Aberdeen, where her tutors included Joyce Cairns RSA and Keith Grant.  Since the success of her 2005 degree show she has exhibited across the UK including the Royal Scottish Academy, Edinburgh.  Her works are in both private and public collections.  In October 2006 she came to the attention of Charles Saatchi with her first solo exhibition at the Dundas Street Gallery, Edinburgh.  In April 2007 "The Herald" ranked her in the top five most collectable artists in Scotland.

Hong Lei (artist): Hong Lei (; born 1960) is one of the leading artists in the era of China's New Photography movement in the 1990s.  He was born in Changzhou, Jiangsu in 1960 and graduated from Nanjing University of the Arts in 1987.  In 1992, he went to the China Central Academy of Fine Arts to pursue advanced studies in printmaking.  Inspired by his early art experience in Yuan Ming Yuan and learning from traditional Chinese paintings, he returned to Changzhou and soon started to use photography as a way of art representation since 1996.  His renowned works include "Autumn in the Forbidden City" (1997), "Chinese Landscape" (1998), "After Liang Kai's (Song Dynasty) Masterpiece Sakyamuni Coming Out of Retirement" (1998), "I Dreamt that I was Hung Upside Down to Listen to Huizong Play the Zither with Chairman Mao" (2004) and "Nothing to Hide" (2008), among others.  Apart from his success in digital photos, he started to photograph black and white Shan shui landscapes as an ongoing experimental project since 2000 to rethink Chinese traditional aesthetics.  In recent years, he has also explored the various boundaries and possibilities of photography by painting his own photos on silk, as well as video & installation works.  His selected solo and group exhibitions include "Recontres d' Arles: Arles Phototography Festival" (Arles, France, 2003), "Alors, La Chine? , Chinese Contemporary Art Exhibition" (Pompidou Centre, Paris, 2003), "Seven Worthies" (solo exhibition, Beijing, 2007), "Seasons" (solo exhibition, Beijing, New York, 2008), 2011 Chengdu Biennale, "Mi Lou" (solo exhibition, Beijing, 2012) and "Perfume This is Not" (solo exhibition, Shanghai, 2012).  Now he lives and works in Changzhou and Shanghai.

Roncesvalles Avenue: Roncesvalles Avenue is a north-south arterial street in Toronto, Ontario, Canada.  It begins at the intersection of Queen Street West, King Street West and the Queensway running north to Dundas Street West.  At its southern starting point, King Street West traffic continues northward onto Roncesvalles Avenue unless the traffic turns east or west onto Queen Street West or the Queensway.  At its northern end point, traffic continues onto Dundas Street, which is essentially a straight-line northern extension of Roncesvalles.  Roncesvalles Avenue takes its name from the Battle of Roncesvalles, which took place in the Roncesvalles Pass in Spain in 1813.  (The name 'Roncesvalles' means 'valley of thorns' in Spanish.)  At this gorge, Colonel Walter O'Hara—an early 19th-century Irish settler who played a significant role in the establishment of the neighbourhood—led a regiment that fought against the retreating army of Napoleon.

Supporting paragraphs: Catriona Millar Charles Saatchi
Answer: Saatchi & Saatchi