interface Pet {
  name: String!
}

enum DogCommand {
  SIT
  HEEL
}

enum CatCommand {
  JUMP
}

type Dog implements Pet {
  name: String!
  nickname: String!
  barkVolume: Int!
  doesKnowCommand(dogCommand: DogCommand!): Boolean!
}

type Cat implements Pet {
  name: String!
  meowVolume: Int!
  doesKnowCommand(catCommand: CatCommand!): Boolean!
}

type Query {
  pet: Pet
}

query getPet {
  pet {
    ...conflictingDifferingResponses
  }
}

fragment conflictingDifferingResponses on Pet {
  ... on Dog {
    someValue: nickname
  }
  ... on Cat {
    someValue: meowVolume
  }
}