Assertion: pig's sense | /r/ObjectUse | used for the search
Facets:
value: within that area
type: LOCATION
Source sentences:
text: Using an artificial sow to rear groups of piglets, Jeppesen (1982) suggested that recognition of a teat in a particular area of the udder depended on visual orientation by means of reference points on the udder to find the area, and then the olfactory sense is used for the search within that area.