Assertion: jellyfish's cell | /r/CapableOf | form the umbrella
Facets:
Source sentences:
text: Most of their body is a gelatinous material called mesoglea surrounded by two layers of cells that form the umbrella.
text: This gelatinous material is surrounded by two layers of cells which forms the umbrella.
text: Most of their umbrella mass is a gelatinous material (the jelly) called mesoglea, which is surrounded by two layers of cells which forms the umbrella (top surface).