 Complete the following phrase:  Chad, a landlocked country in Central Africa, participated in 11 Summer Olympic games between its debut in the 1964 Summer Olympics in Tokyo, Japan and the 2012 Summer Olympics in London. The highest number of Chadian athletes to have participated in the summer games is six in the 1988 Summer Olympics in Seoul, South Korea. , no Chadian athlete has ever won a medal at the Olympics. Two athletes from Chad qualified for the London games; Hinikissia Ndikert in the 