Question: Chouteau Island and Gateway Arch can both be found having at least half of their area in what state?
Sentence (from "Chouteau Island"): Chouteau Island ( ), situated approximately 8 mi due north of the Gateway Arch in St. Louis, Missouri, and approximately 1 mi south of the confluence of the Missouri River and Mississippi River, is one of a cluster of three islands: Chouteau Island, Gabaret Island, and Mosenthein Island.
Relevant evidence: Yes