Given the document below, you have to determine if "Yes" or "No", the summary is factually consistent with the document.

Document:
United Nations officials rarely use the words "genocide" and "ethnic cleansing," but they now say potentially both could envelop the world's youngest country. Since violence flared in Juba in July and spread to the previously peaceful southern Equatoria states of South Sudan, 340,000 people have fled the violence into neighbouring Uganda. That is more than any other country this year - the UN says 200,000 people have fled Syria in 2016. Every day, on average, another 2,500 South Sudanese become refugees, and the stories of what they escaped and what they saw on the way, add to the evidence of killing, rape and the targeting of civilians along ethnic lines. NAME_1 has twice walked over the small wooden bridge dividing South Sudan and Uganda at an unofficial border crossing known as Busia. A trickle of a stream divides these two countries and there are small bridges or fallen

Summary:
1. South Sudan's civil war has been described by the UN as' genocide' and' ethnic cleansing'.

Is the summary factually consistent with the document? (Yes/No)
Start your answer explicitly with "Yes" or "No", and if you answer no, explain which sentence is inconsistent and why.
