#rib.anatomical_structure  a riblike supporting or strengthening part of an animal or plant
  supertype:  anatomical_structure__structure__complex_body_part__bodily_structure__body_structure  a particular complex anatomical structure; "he has good bone structure"
  subtype:  quill.rib__calamus__shaft  the hollow shaft of a feather
  subtype:  vein.rib__nervure  one of the horny ribs that stiffen and support the wing of an insect
  subtype:  nervure__vein  one of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ
     subtype:  midrib  the vein in the center of a leaf

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