Assertion: oyster | /r/HasProperty | expanded to 437 000 tonnes
Facets:
value: by 1970
type: TEMPORAL
value: from 156 000 tonnes
type: OTHER
Source sentences:
text: Worldwide aquaculture production of the Pacific cupped oyster continues to expand steadily, having expanded from 156 000 tonnes in 1950 to 437 000 tonnes by 1970, and 1.2 million tonnes by 1990.