The given question might contain grammatical errors, typing mistakes, etc., or might not make sense in the context of the paragraph (for instance, it might not be related to the content of the paragraph or not be answerable at all). In such cases, the question is bad and indicates it by responding "Yes". If you could not find any issue in the given question, respond "No". There are only two types of responses possible:"Yes" and "No".

Paragraph- Sent 1: One day Magneson took a walk in the park.
Sent  2: He passed some trees and a pond.
Sent  3: In the pond was a duck named George.
Sent  4: George's wife was also in the pond.
Sent  5: Her name was Nancy.
Sent  6: Magneson walked over to the tree.
Sent  7: Nancy flew up into the tree.
Sent  8: She wanted to warn Magneson about the killer squirrel who lived inside of the tree.
Sent  9: A few years before, the squirrel had thrown a chestnut at George and Nancy's son.
Sent  10: He was knocked out, and the squirrel took him away.
Sent  11: He was never seen again.
Sent  12: Magneson asked what their son's name was.
Sent  13: They said it was Leonard.
Sent  14: But Magneson was only making small talk.
Sent  15: He didn't believe the story about the killer squirrel.
Sent  16: Even if there was one, there were many rocks by the pond that he could throw at the squirrel.
Sent  17: He could also hide in the tall grass.
Sent  18: George and Nancy were sorry to see that Magneson wouldn't listen.
Sent  19: They flew away, singing a sad song.
Sent  20: A short time later, the squirrel came out of the tree and threw a giant walnut at Magneson.
Sent  21: No one ever saw Magneson again.? 
Question: Upon making the realization Magneson would not listen to reason, what kind of song did George and Nancy sing as they left the scene?
No.