Assertion: park's use | /r/Causes | some consternation
Facets:
value: with the introduction of artificial detergents
type: OTHER
value: in the 1950s
type: TEMPORAL
Source sentences:
text: In the 1950s, the use of this effluent during cold weather caused some consternation, with the introduction of artificial detergents but before the advent of modern biodegradable products.