Assertion: spaniel's number | /r/CapableOf | dwindle due
Facets:
value: over the years
type: TEMPORAL
value: both
type: CAUSE
Source sentences:
text: Over the years the numbers of the breed began to dwindle due both to a reduction in the duck population through those valley areas, and because of a switch in hunting – from a means to gather food for survival to that of recreation.