Assertion: blackbird's song | /r/HasProperty | given
Facets:
value: sometimes
type: TEMPORAL
value: from winter
type: TEMPORAL
value: spontaneously
type: TEMPORAL
Source sentences:
text: Their song is given from winter to summer, with the singing male usually perched on a high branch, tree top or power line.
text: However, similar song is sometimes given spontaneously when there is no obvious use for it.