Question: Who in the student body at the Xavier Institute were originally called the Five-in-One?
Sentence (from "Stepford Cuckoos"): The Stepford Cuckoos are a set of fictional mutant psychically linked quintuplets (Celeste Cuckoo, Esme Cuckoo, Irma "Mindee" Cuckoo, Phoebe Cuckoo, and Sophie Cuckoo).
Relevant evidence: Yes