World Expos, previously known as universal expositions, are the biggest category events. Nielsen Expositions operated tradeshows in the United States. The World Trade Center Seoul, located in Gangnam District, hosts various expositions and conferences. He directed radio programs for fairs and expositions in the mid-1930s. There are many concerts, talks, expositions, and other activities. Doctrinal elaborations were preserved in Abhidharma works and later Karikas (verse expositions). Other ethnological expositions included Egyptian and Bedouin mock settlements. There is a smaller pavilion for expositions and concerts. Hindery notes the inconsistent and diverse expositions of kama in various ancient texts of India. In the following days at the Parc des Expositions, detainees were subject to inhumane treatments. Such themes are more specific than the wider scope of world expositions. Another common use is to host big expositions and rock or pop concerts. Between 1885 and 1915, the Liberty Bell made seven trips to various expositions and celebrations. The fair, registered under the Bureau International des Expositions (BIE), celebrated the city's centennial. It contains a forum for 800 people, lobby with two wings for expositions and workshops.