Assertion: lobster | /r/HasAspect | blue blood
Facets:
value: due to the presence of hemocyanin
type: CAUSE
Source sentences:
text: Lobsters, like snails and spiders, have blue blood due to the presence of hemocyanin, which contains copper.
text: Lobsters, like snails and spiders, have blue blood due to the presence of the blood pigment haemocyanin, which contains copper rather than iron which is in haemoglobin.