code: function breakwords () {
    return through2.obj(function (chunk, _, cb) {
      const words = chunk.split(' ')
        .map(i => i.trim())
        .filter(Boolean)
        .filter(i => i !== '(LISTEN)') // ugh.
      this.push(words)
      cb()
    })
  }
docs: => Stream<words:[String]>