Assertion: hedgehog's number | /r/CapableOf | decrease by 50%
Facets:
value: in the uk
type: LOCATION
value: since the start of the century
type: TEMPORAL
Source sentences:
text: We want you to have a better understanding of the wildlife you host in your garden – especially when it comes to hedgehogs, whose numbers have decreased by 50% in the UK since the start of the century.