According to Otto's encyclopedia, what is the shortest unit of time ?
select ?ent where { ?ent wdt:P31 wd:Q1790144 . ?ent wdt:P2370 ?obj . ?ent wdt:P1343 wd:Q2041543} ORDER BY ASC(?obj)LIMIT 5 
unit of time: Q1790144 ottův slovník naučný: Q2041543