Assertion: humpback whale's song | /r/CapableOf | last 10 to 20 minutes
Facets:
Source sentences:
text: Males produce a complex song lasting 10 to 20 minutes, which they repeat for hours at a time.
text: Each song lasts for between 10-20 minutes, and is sung by all males in a regional group.
text: Males produce a complex song lasting 10 to 20 minutes, which they repeat for hours at a time.