Assertion: mussel's valve | /r/HasProperty | joined on the outside
Facets:
value: by a ligament
type: CAUSE
value: together
type: MANNER
Source sentences:
text: The valves are joined together on the outside by a ligament, and are closed when necessary by strong internal muscles (anterior and posterior adductor muscles).
text: The valves are joined together on the outside by a ligament, and are closed when necessary by strong internal muscles.
text: The valves are joined together on the outside by a ligament, and are closed when necessary by strong internal muscles.