Assertion: mockingbird | /r/CapableOf | produce unbroken sweep
Facets:
value: on one or both sides
type: LOCATION
Source sentences:
text: When a mockingbird imitates a cardinal's song, for example, does it do so by joining sounds produced sequentially on each side of the syrinx to generate extended FM sweeps as the cardinal does, or does it produce an unbroken sweep on one or both sides together?