 Complete the following phrase:  Zambia has participated at twelve Olympiads from its début at the 1964 Summer Olympics in Tokyo, Japan as Northern Rhodesia and the 2012 Summer Olympics in London, England, with the exception of the 1976 Summer Olympics in Montreal, because of a boycott relating to the New Zealand national rugby union team touring South Africa. Two Zambian athletes Keith Mwila and Samuel Matete have won medals at the Olympic Games and the nation has yet to debut at the Winter Olympic Games. The country sent athletes Gerald Phiri, Prince Mumba and Chauzje Choosha, boxer Gilbert Choombe, judoka Boas Munyonga and swimmers Zane Jordan and Jade Ashleigh Howard to London. The Zambian teams delegation was led by the countrys NOC president Gabriel Muyinda. Mumba was the flag bearer for both the opening and 