Assertion: trout's amount | /r/CapableOf | reduce to less than 50 per cent
Facets:
value: in recent years
type: TEMPORAL
Source sentences:
text: Feed formulations for rainbow trout use fish meal, fish oil, grains and other ingredients, but the amount of fish meal has reduced to less than 50 per cent in recent years by using alternative protein sources such as soybean meal.