Give the central processing unit with the lowest thermal design power whose part of the class is L3 cache?
select ?ent where { ?ent wdt:P31 wd:Q5300 . ?ent wdt:P2229 ?obj . ?ent wdt:P2670 wd:Q28972917. } ORDER BY ASC(?obj)LIMIT 5 
central processing unit: Q5300 l3 cache: Q28972917