What is the meaning of "where others have failed" in the following sentence,
One country that appears to have succeeded with the coronavirus where others have failed is South Korea.
(Source: BBC WORLD NEWS)
Does it mean "One country that appear to have succeeded with the coronavirus where(=in one country) is South Korea. and Others have failed with coronavirus" ?
If so, why did BBC New put "Others have failed" not out of the sentence,but into the sentence, "One country that appear to have succeeded with the coronavirus where is South Korea"? Is this still grammatically correct? What kind of grammar are these?