The request for the tests came from investigators in Germany who are trying to learn how a Russian businessman came to leave traces of the radioactive material , polonium 210 , at sites around Hamburg in the days before he flew to London and met Mr. Litvinenko on Nov. 1 .
Hamburg /location/administrative_division/country Germany
Germany /location/location/contains Hamburg
Germany /location/country/administrative_divisions Hamburg
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Hamburg
LOCATION
Germany
LOCATION
/location/administrative_division/country
Germany
LOCATION
Hamburg
LOCATION
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Germany
LOCATION
Hamburg
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