Assertion: kelp | /r/ObjectUse | used as main source
Facets:
value: for the production of crude alginates
type: PURPOSE
value: in china
type: LOCATION
Source sentences:
text: In China, the kelp Saccharina japonica, introduced from Japan to China in the 1950s and grown on ropes in the Yellow Sea, was used as the main source for the production of crude alginates.