 Complete the following phrase:  Sean Safo-Antwi born 31 October 1990 in London is a Ghanaian sprinter. He competed for Great Britain before switching allegiance to Ghana in early 2016, a move that was not opposed by the British Federation. He was due to represent Ghana for the first time at the 2016 World Indoor Championships but was withdrawn at the last minute. In 2016 he represented Ghana in the 