What key details about yu eung-bu can be extracted from the following bio? Bio: yu eung-bu -lrb- died 1456 -rrb- was a military official of the early joseon dynasty and is remembered as one of the six martyred ministers . yu was born in pocheon ; his date of birth and lineage are not known with certainty . he served in the gyeongwon garrison as '' jeoljesa '' in 1448 , and was the commander of uiju-mok in 1452 . in 1455 , then king danjong was overthrown by sejo . yu joined a conspiracy of high officials to restore danjong . however , the plot was discovered shortly before it would have been executed in 1456 . yu and the other conspirators were arrested ; after he failed to repent under torture , he was executed . a memorial to yu stands today in soheul-eup , pocheon , gyeonggi-do , south korea .
A:
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