Question: What is the business enterprise with the highest maximum gradient whose instance of is business enterprise?
Paraphrase: What company has the top score for companies?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q4830453 . ?ent wdt:P2595 ?obj . ?ent wdt:P31 wd:Q4830453 } ORDER BY DESC(?obj)LIMIT 5 
Answer: Death Valley Railroad, Waukesha Beach Railway, Great Indian Peninsula Railway, Voxna-Lobonäs järnväg, Mississippi River and Bonne Terre Railway