 Complete the following phrase:  She rose in the youth ranks in 2005, taking a 3000 metres silver medal at the IAAF World Youth Championships in Athletics and took the world junior cross country title at the 2006 IAAF World Cross Country Championships. After winning youth medals on the track at World and African junior level, she has represented Kenya at the senior level in both cross country and the 10,000 metres at the African Championships in Athletics. She won two bronze medals at the 2011 All-Africa Games and a gold medal at the 