Question: In the scandal that received the most attention among food safety incidents, what was the food adulterated with?

full_context: Document 1: Food safety incidents in China: Food safety incidents in China have received increased international media scrutiny following the reform and opening of the country, and its joining the World Trade Organization. Urban areas have become more aware of food safety as their incomes rise. Food safety agencies in China have overlapping duties. The 2008 Chinese milk scandal received the most attention among food safety incidents.
Document 2: Food safety: Food safety is a scientific discipline describing handling, preparation, and storage of food in ways that prevent foodborne illness. This includes a number of routines that should be followed to avoid potential health hazards. In this way food safety often overlaps with food defense to prevent harm to consumers. The tracks within this line of thought are safety between industry and the market and then between the market and the consumer. In considering industry to market practices, food safety considerations include the origins of food including the practices relating to food labeling, food hygiene, food additives and pesticide residues, as well as policies on biotechnology and food and guidelines for the management of governmental import and export inspection and certification systems for foods. In considering market to consumer practices, the usual thought is that food ought to be safe in the market and the concern is safe delivery and preparation of the food for the consumer.
Document 3: 2008 Chinese milk scandal: The 2008 Chinese milk scandal was a food safety incident in China. The scandal involved milk and infant formula along with other food materials and components being adulterated with melamine.
Document 4: 2013 Taiwan food scandal: The 2013 Taiwan food scandal refers to food safety incidents in the Republic of China (Taiwan) that began in October 2013. Affected products included cooking oil, health pills, alcoholic beverages, milk and rice.
Document 5: 2014 Taiwan food scandal: The 2014 Taiwan food scandal refers to a series of food safety incidents in Taiwan that came to light in 2014. Adulteration of cooking oil with recycled waste oil and animal feed oil was discovered in September 2014. Despite coming to light only in 2014, mass food adulteration by Taiwanese food conglomerates, however, has been suppressed for decades, and the food safety crisis has been among the reasons for the electoral defeat of the Kuomintang in late 2014. At least 1,256 businesses were affected in the gutter oil scandal. In November 2014 it was found that dried tofu products (a.k.a. "dougan" 豆乾) have been adulterated with an industrial dye, methyl yellow (a.k.a. dimethyl), for some 20 years. In December 2014, it was furthermore found that even regular non-dyed tofu has been found contaminated with carcinogens, resulting in over 25,000 kg recalled.
Document 6: Camelford water pollution incident: The Camelford water pollution incident involved the accidental contamination of the drinking water supply to the town of Camelford, Cornwall, in July 1988. Twenty tonnes of aluminium sulphate was inadvertently added to the water supply, raising the concentration to 3,000 times the admissible level. As the aluminium sulphate broke down it produced several tonnes of sulphuric acid which "stripped a cocktail of chemicals from the pipe networks as well as lead and copper piping in people’s homes." Many people who came into contact with the contaminated water experienced a range of short-term health effects, and many victims suffered long-term effects whose implications remained unclear as of 2012 . There has been no rigorous examination or monitoring of the health of the victims since the incident, which is Britain's worst mass poisoning event. Inquests on people who died many years later found very high levels of aluminium in the brain. Dame Barbara Clayton led a Royal Commission on Environmental Pollution enquiry into the incident.
Document 7: 1998 Delhi oil poisoning: In 1998, adulterated mustard oil poisoning in Delhi resulted in widespread dropsy and deaths of 60 people and illness of more than 3000. It was revealed that white oil, a petroleum product was mixed with edible mustard oil. Sale of mustard in loose quantity was banned by a court order, to prevent more health hazards. In September 1998, the ban on packed mustard oil was removed after a Cabinet decision with a condition that the date of packing should be prominently displayed. Even though mustard oil is banned as an edible oil in countries like USA, Canada and EU due its erucic acid content, the oil is widely used as an edible oil in North India, Pakistan and Nepal.
Document 8: 2008 Longnan riot: The 2008 Longnan riot was a protest that turned into a riot involving thousands of people in Longnan, Gansu, People's Republic of China.
Document 9: Food safety in China: Food safety in China is a growing concern relating to agriculture. China's principal crops are rice, corn, wheat, soybeans, and cotton in addition to apples and other fruits and vegetables. China's principal livestock products include pork, beef, dairy, and eggs. The Chinese government oversees agricultural production as well as the manufacture of food packaging, containers, chemical additives, drug production, and business regulation. In recent years, the Chinese government attempted to consolidate food safety regulation with the creation of the State Food and Drug Administration of China in 2003; officials have also been under increasing public and international pressure to solve food safety problems. Chinese Vice Premier Li Keqiang said, "Food is essential, and safety should be a top priority. Food safety is closely related to people's lives and health and economic development and social harmony," at a State Council meeting in Beijing.
Document 10: 2010 Johnson &amp; Johnson children's product recall: 2010 Johnson &amp; Johnson children's product recall
Document 11: Grade A milk: In the United States, Grade A milk, also called fluid grade milk, refers to milk produced under sufficiently sanitary conditions to qualify for fluid (beverage) consumption. Only Grade A milk is regulated under federal milk marketing orders. Grade B milk (also referred to as manufacturing grade milk) does not meet fluid grade standards and can only be used in cheese, butter and nonfat dry milk. More than 90% of all milk produced nationally is Grade A, and much of the Grade A milk supply is used in manufactured dairy products.
Document 12: Pizza in China: The presence of pizza restaurant chains has contributed to a significant increase in pizza consumption in China. This also had an effect of introducing cheese as a culinary ingredient and everyday food in China, which was relatively uncommon in Chinese cuisine prior to the emergence of pizza chains. Pizza Hut opened its first store in China in 1990, and several pizza restaurant chains exist in China today.
Document 13: China Green Food Development Center: The China Green Food Development Center (Chinese: 中国绿色食品发展中心; abbreviated CGFDC) is the first agency in the People's Republic of China to oversee organic food standards. The Center was established in November 1992, and has been launched its work around 1990, under the jurisdiction of the Ministry of Agriculture of the People's Republic of China. Afterwards, the CGFDC joined the International Federation of Organic Agriculture Movements(IFOAM)in 1993.The center of headquarter is located in Beijing includes general office and divisions of logo management, authentication, sci-tech and standard, planning and finance and international cooperation etc..Currently,it has set up 42 local food regulatory agencies,commissioned the 38 quality inspection agencies, and 71 green food producing environmental monitoring branches. Its basic purpose is to promote the development of food with safety and nature, to protect the ecological environment and to maintain the development of economy and society. Its mainly responsibilities include：developing Green Food generation policies, regulations and planning organizations to develop green food standards, organizing and guiding the development and management of Green Food; trademark green logo management, review, approve green flag products; commissioned and coordinating the work of local agencies and green environment and product quality monitoring; organize research, technology promotion, training, advocacy, information services, green building demonstration bases, as well as foreign economic and technological exchanges and cooperation. The main partners consist of some organizations namely China Organic Food Certification Center（abbreviated COFCC）,State Food and Nutrition Consultant Committee, Food and Agricultural Organization of the United Nations and Development Research Center of the State Council as well as some media networks as supporters. It has already published couples reports named" Green Food Products Bulletin","Green Fashion",and "Brief Report of the Center"to the public.
Document 14: China Current: China Current is an independent news agency which publishes articles in both Chinese and English to cater to its different target audiences. While its core focus is on China, it covers news from all across the world. Its bases are on the Chinese mainland, Hong Kong, and Macau, North America and the United Kingdom. China Current is in the process building a leading public platform for independent news coverage. In addition to concentrating on current affairs, the economic environment and advances in science and technology, it also pays attention to the dark side of modern society and raise the profile of the plight of those who have suffered due to the market economy. China Current is a trailblazer in digging up “the stories behind the news”, and works to observe social trends in an objective and specialized manner.
Document 15: Nicholas Alipui: Nicholas Alipui is UNICEF's Director of Programmes. He chairs the Global Network for Sustained Elimination of Iodine Deficiency. In 2000, he was UNICEF's representative in Kenya and said that "the ongoing abduction and abuse of children in Kenya is one of the most serious violations of human rights." By 2004, he had become UNICEF's representative in the Philippines and called attention to the lack of official recognition of child pornography as a problem in the country. In this capacity, he also spoke out against the military use of children in the country and denounced infant formula, calling on the country's mothers to breastfeed. In 2008, as Director of Programmes, he met with President of Madagascar Marc Ravalomanana in order to strengthen the ties between Madagascar and the United Nations. In 2010, Alipui said that UNICEF and its partners in the Roll Back Malaria Partnership hoped to put an end to malarial deaths by 2015. In 2011, the European Food Safety Authority (EFSA) permitted infant formula company Mead Johnson to claim that the addition of docosahexaenoic acid to their infant formula contributes to the development of the visual system in infants, but Alipui opposed the EFSA's decision, saying that "there can be little doubt that the use of such health claims can mislead parents into thinking that the formulas are as good as, if not better than breast milk." He was interviewed in "Not My Life", an independent documentary film about human trafficking.
ground_truth: melamine