type House implements Node {
  id: ID!
  name: String!
  power_data(after: String, first: Int, before: String, last: Int): [PowerDatum]
  habitants(after: String, first: Int, before: String, last: Int): [User]
}

interface Node {
  id: ID!
}

type PowerDatum implements Node {
  id: ID!
  power: Float
  time: Int
}

type Query {
  node(id: ID!): Node
  viewer: User
}

type User implements Node {
  id: ID!
  username: String!
  house: House
}