Assertion: histamine | /r/RelatedTo | the key
Facets:
value: within this framework
type: OTHER
value: often
type: TEMPORAL
Source sentences:
text: Within this framework, histamine is often compared to the key, and receptors to locks the key opens and respectively launches a number of different physiological processes -- from headaches, skin rashes, and diarrhea, up to anaphylactic shock.