Assertion: ostrich's wing | /r/HasProperty | strong
Facets:
Source sentences:
text: Some people think that a long time ago ostriches had strong wings and could fly, but they stopped flying so their wings got smaller and smaller.
text: Ostrich and Emus have wings that are small and weak and have no breast bone keel to attach strong breast muscles to.
text: Ostrich wings are strong, and the bird uses them for ventilation when it gets hot.