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

Document:
NAME_1 was taking part in a ceremony to mark 70 years since Allied troops liberated the last Nazi camps at the end of World War Two. "The worst can always happen," NAME_2 said at the site of Natzweiler-Struthof in Alsace. "We prevent it by knowing." Most of the 50,000 inmates were French resistance fighters, but they also included Jews and gypsies. By the time of its liberation, almost half the prisoners had died. The Nazis built and tested one of their first gas chambers at the camp. France has been grappling with rising attacks on both Jews and Muslims after deadly shootings by Islamist gunmen in January, sparking fresh debate about growing social tensions, says the BBC's NAME_3 in Paris. Commemorations have also been held in northern Germany to mark the 70th anniversary of the liberation of the Bergen-Belsen concentration camp, where an estimated 70,000 people were

Summary:
1. The French president has warned that "the worst can always happen" as he visited the site of a former Nazi concentration camp where about 50,000 people died in World War Two.

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.
 Your response should contain 300+ words.
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