Question: The Australian food spread developed by Cyril Percy Callister is considered an acquired taste based on what sense?
Context: Vegemite ( ) is a thick, black Australian food spread made from leftover brewers' yeast extract with various vegetable and spice additives.  It was developed by Cyril Percy Callister in Melbourne, Victoria in 1922.  The Vegemite brand was owned by Mondelez International, but was acquired by the Australian Bega Cheese group following an agreement in January 2017. Nattō (なっとう or 納豆 ) is a traditional Japanese food made from soybeans fermented with "Bacillus subtilis var.  natto".  Some eat it as a breakfast food.  It is served with soy sauce, karashi mustard and Japanese bunching onion.  Nattō may be an acquired taste because of its powerful smell, strong flavor, and slimy texture.  In Japan nattō is most popular in the eastern regions, including Kantō, Tōhoku, and Hokkaido. Australian Food and Grocery Council (AFGC) represents Australia's food, drink and grocery manufacturing industry.  AFGC's stated vision is for Australia's food, beverage and grocery manufacturing industry to be socially responsible and competing profitably domestically and overseas.  The chief executive officer of the Australian Food and Grocery Council is former Liberal party politician, Kate Carnell, who was Chief Minister of the Australian Capital Territory (ACT) from 1995 to 2000. An acquired taste is an appreciation for something unlikely to be enjoyed by a person who has not had substantial exposure to it.  In the case of food and drink, this may be due to a strong odor (such as stinky tofu, Gefilte fish, durian, hákarl, black salt, nattō, stinking toe, asafoetida, surströmming, or certain types of cheese), taste (alcoholic beverages, Vegemite or Marmite, bitter teas, salty liquorice, malt bread, unsweetened chocolate, sushi, garnatálg), or appearance.  Acquired taste may also refer to aesthetic tastes, such as taste in music, other forms of art, or in beauty. Matt Preston (born 18 December 1963) is an English Australian food journalist, restaurant critic, writer, and television personality.  He is known for his role as a judge on Network Ten's "MasterChef Australia" and his weekly food column in the "Taste" supplement available in the "Herald Sun", "The Courier-Mail" and "The Daily Telegraph" (Australia) newspapers.  Preston is a columnist for Taste.com.au magazine and a senior editor for "delicious."  magazine.  He is also the author of three best-selling cookbooks. Salty liquorice, also known as salmiak or salmiakki (in Finland), is a variety of liquorice flavoured with ammonium chloride, common in the Nordic countries, the Netherlands, and northern Germany.  Ammonium chloride gives salty liquorice an astringent, salty taste (hence the name), which has been described as "tongue-numbing" and "almost-stinging".  Salty liquorice is an acquired taste and people not familiar with ammonium chloride might find the taste physically overwhelming and unlikeable.  Salty liquorice candies are almost always black or very dark brown and can range from very soft to very hard and may be brittle.  The other colours used are white and variants of grey.  Salty liquorice is also used as a flavouring in other products, such as ice creams and alcoholic beverages. Kent Callister (born 9 November 1995) is an Australian snowboarder.  He has competed at the 2014 Winter Olympics in Sochi.  His great-grandfather's second cousin, Cyril P. Callister, invented Vegemite. Lava Cola (officially Lava Cola – Vanuatu Kava Cola) is a cola drink produced in Vanuatu by Vanuatu Beverage Ltd.  It contains a kavalactone additive, kava consumption being traditionally important in western Pacific nations.  Lava Cola has been described as an "anti-energy drink".  Australian media have noted that it "produces the calming effect of kava without the muddy taste," adding that, while kava itself is an acquired taste, Lava Cola may well be suitable for export. Cyril Percy Callister (16 February 1893 – 5 October 1949) was an Australian chemist and food technologist who developed the Vegemite yeast spread. Peter Hardwick (born 1958) is an Australian food horticulturist and environmentalist, recognized as an early pioneer of the Australian bushfood industry.  He publicly challenged the established belief that native Australian food plants were not suitable for cropping; conceived the commercial strategy of processing strong flavored native food plants; and, developed the use of wild and seedling genetic diversity to overcome the lack of domesticated varieties previously considered a limitation with Australian native food plants.
Answer: taste