After months of preparation , Polyus listed about three weeks after Oleg Mitvol , deputy head of Russia 's environmental regulator , had threatened to revoke licenses held by Peter Hambro Mining , a separate London-listed gold mining company .
Oleg Mitvol /people/person/nationality Russia
IN NNS IN NN , NNP VBD RB CD NNS IN NNP NNP , JJ NN IN NNP POS JJ NN , VBD VBN TO VB NNS VBN IN NNP NNP NNP , DT JJ JJ NN NN NN .
Oleg Mitvol
PERSON
Russia
LOCATION
/people/person/nationality