anchor.diff:          (tech "transponders")
           (tech "conduits")
           (subatomic "waves")
  +        (subatomic "pulses")
           (material "crystals")))
   
  +(projectile -> (a (? tech-kind)
  +                  (or
  +                   (subatomic "pulse")
  +                   (subatomic "field")
  +                   (subatomic "wave"))))
  +
  +(emission -> (? tech-kind)
  +          (or
  +           (material "particles")
  +           (subatomic "waves")
  +           (subatomic "pulses")))
   
   (prep-phrase -> (or
                    ("around the" noun-phrase)
  
positive.code:                   "baryonic"
                    "static"
                    "ionic"
                    class-designation
                    level-designation))
  (material -> (or
                "dilithum"
                "aluminium"))
  (subatomic -> (or "tachyon"
                    "neutrino"
                    "proton"
  
negative.code:             ("trimming" qualified-noun-phrase)
              ("regulating" qualified-noun-phrase)
              ("stabilizing" qualified-noun-phrase)
              ("reversing" qualified-noun-phrase)
              ("firing" projectile "at" qualified-noun-phrase)
              ("emitting" emission "from" qualified-noun-phrase)))
  
  (part -> tech-kind (or n pn))
  (subject-to-be -> (or
                     ("a" n "is")
  