Which 1435 mm track gauge locomotive has the maximum boiler pressure?
select ?ent where { ?ent wdt:P31 wd:Q19832486 . ?ent wdt:P5071 ?obj . ?ent wdt:P1064 wd:Q1999572 } ORDER BY DESC(?obj)LIMIT 5 
locomotive class: Q19832486 1435 mm track gauge: Q1999572