#introduction  the first section of a communication
  supertype:  section__subdivision  a self-contained part of a larger composition; "he always turns first to the business section"; "the history of this work is discussed in the next section"
  part of:  narration  address.speech_act
  subtype:  opening.introduction  the initial part of the introduction; "the opening established the basic theme"
     subtype:  salutation  word of greeting used to begin a letter
  subtype:  foreword__preface__prolusion  a short introductory essay preceding the text of a book
  subtype:  preamble  a preliminary introduction to a statute or constitution (usually explaining its purpose)
  subtype:  prologue  an introduction to a play

No statement uses or specializes introduction; click here to add one.