essential

https://w3id.org/framester/framenet/abox/lu/essential.adj <https://w3id.org/framester/framenet/tbox/LexUnit>

essential 
adj 
essential.adj 
<https://w3id.org/framester/framenet/tbox/LexUnit>
<http://premon.fbk.eu/resource/adj-essential>
<https://w3id.org/framester/framenet/abox/frame/Being_necessary>

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