2939
The submarine was among  British  vessels sent to the Baltic Sea during WWI on the order of  Winston Churchill  -- who at the time headed the British Navy -- to support Russia in its attempts to stop German shipments of iron ore from Sweden .
 origin: British, Winston Churchill
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  British, Winston Churchill 
Answer:
 origin: British, Winston Churchill