Assertion: mussel | /r/HasProperty | developed in thirteenth century
Facets:
value: by chance
type: CAUSE
value: by an irishman
type: OTHER
Source sentences:
text: It was developed in the thirteenth century, by chance, by an Irishman who discovered that mussels were clinging to the posts where the nets were stretched to catch birds, and that they collapsed under the weight of the mussels clinging.