Assertion: algae | /r/HasProperty | diatom
Facets:
Source sentences:
text: A group of algae (diatoms) deposit silica in their walls.
text: A group of algae (diatoms) deposit silica in their walls.
text: The skeletons of a group of algae, the diatoms, are glass-like and this material is put to a variety of uses, such as abrasives (it used to be used in toothpaste!), reflective road signs, swimming pool filters.