{-(Program
  (Comprehension
    (KeyValue
      (Identifier)
      (Identifier))
    (
      (
        (
          (Identifier))
        (Identifier))))
  (Comprehension
    (KeyValue
      (Identifier)
      (Identifier))
    (
      (
        (
          (Identifier))
        (Identifier))
      (
        (Identifier)))))-}