Question: Where is the Russian Empire's field army based?
Paraphrase: Where is the Russian Empire's field armed force based?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P276 wd:Q34266 . ?sbj wdt:P31 wd:Q51977 } 
Answer: 1st Army, 4th Army, 5th Army, 2nd Army, 11th Army, 12th Army, 7th Army, Russian Special Army, Russian Danube Army, 6th Army