Assertion: male mockingbird | /r/CapableOf | add more songs
Facets:
value: to his delivery
type: TRANSITIVE-OBJECT
value: at the same time
type: TEMPORAL
Source sentences:
text: From one spring to the next, an individual male mockingbird repeats a minimum of 35 to 63 percent of his previously heard song types, while at the same time adding more songs to his delivery.