had political and cultural historical significance. In the body of photostat works, the events/dates are printed in white type on black sheets of photographic paper presented in basic frames with reflective glazing. The viewer’s reflection was visible when reading the line of text. These lists of seeming non sequiturs prompted viewers to consider the relationships and gaps between the diverse references as well the construction of individual and collective identities and memories. González-Torres also employed this strategy for the portraits, as in "Untitled" (Portrait of Jennifer Flay) (1993), which includes, "A New Dress 1971 Vote for Women, NZ 1893 JFK 1963" as well as for the billboards, as in “Untitled” (1989), which includes, “People With AIDS Coalition 1985 Police Harassment 1969 Oscar Wilde 1895.” Key Participatory Works González-Torres was considered within his time to be a process artist due to the nature of his 'removable' installations by which the process is a key feature to the installation. Many of his installations invite the viewer to take a piece of the work with them: a series of works allow viewers to take packaged candies from a pile in the corner of an exhibition space and, in so doing, contribute to the slow disappearance of the sculpture over the course of the exhibition. "Untitled" (Placebo), in one installation, consisted of a six-by-twelve-foot carpet of shiny silver wrapped candies. In 2011, the work "Untitled" (Placebo) was installed at the Museum of Modern Art in two large rectangles divided by a walkway for visitors. Like other candy pieces in his oeuvre, the works have "ideal weights" which may fluctuate during the course of an exhibition. A borrower may choose to install the work at a weight different than the "ideal weight". The candy pieces may also be installed in any formation the borrower desires. Ideally, the candy would be the "Fruit Flashers" brand manufactured by Peerless Confection Company in Chicago and wrapped in multicolored cellophane. However, Peerless Confection Company went out of business in 2006. In 1990 during Roni Horn's solo exhibition at the Museum of Contemporary Art in Los Angeles, González-Torres encountered her sculpture Forms from the Gold Field (1980–82), two pounds of pure gold compressed into a luminous rectangular mat. When he met Horn in 1993, he created "Untitled" (Placebo – Landscape – for Roni) (1993), an endlessly replaceable candy spill of gold cellophane–wrapped sweets. One of his most recognizable works, "Untitled"