Question: Which isotope of lead decaying to lead-203 has the greatest spin quantum number ?
Paraphrase: Which decaying lead-203 has the greatest spin quantum number?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q1372384 . ?ent wdt:P1122 ?obj . ?ent wdt:P816 wd:Q18883424 } ORDER BY DESC(?obj)LIMIT 5 
Answer: lead-203m2, lead-203m1