Question: What binary F-type main-sequence star has the slowest stellar rotational velocity ?
Paraphrase: Name the binary F-type main=sequence star that has the slowest stellar rotational velocity.
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q1353952 . ?ent wdt:P4296 ?obj . ?ent wdt:P31 wd:Q50053. } ORDER BY ASC(?obj)LIMIT 5 
Answer: Iota Piscium, Iota Piscium, HD 114837, Theta Persei, Gamma Leporis