Assertion: blue whale | /r/CapableOf | adjust the frequency of songs
Facets:
value: by blowing air
type: MANNER
value: according to a study
type: OTHER
Source sentences:
text: Blue whales adjust the frequency of songs "by blowing air through their vocal cords at a faster or slower rate," according to a study which was conducted by a group of researchers at Oregon State University and published in August, 2017, after they observed a gradual decline in the frequency of blue whale calls.