What is the Ritchey–Chrétien telescope with the lowest observing time available whose has part is Four Laser Guide Star Facility?
select ?ent where { ?ent wdt:P31 wd:Q1062138 . ?ent wdt:P3891 ?obj . ?ent wdt:P527 wd:Q24820708} ORDER BY ASC(?obj)LIMIT 5 
ritchey–chrétien telescope: Q1062138 four laser guide star facility: Q24820708