Assertion: pipit's call | /r/HasProperty | given by gustavi
Facets:
Source sentences:
text: Alstrom and Mild (2003), reveal that the songs appear "markedly different" (but with the caveat that more research is still required to confirm that this difference is not a product of individual or geographical variation), and that perhaps menzbieri also gives a soft "sit" alarm call at the nest, suspected different to the equivalent call given by gustavi.