You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when was the song old macdonald had a farm written?" whose answer is 1917.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the song old macdonald had a farm written
Useful Output:

Doc 1: “Old MacDonald” did not have a farm until 1925, when the Sam Patterson Trio released a recording using this name. Before that, the song had
Doc 2: Get the Super Simple App! ▻ http://bit.ly/TheSuperSimpleApp ‍ Old MacDonald had a farm. E-I-E-I-O. And on that farm he had a pig.
Doc 3: The well-known children's song "Old MacDonald had a Farm" has lyrics in the following format: Old MacDonald had a farm EIEIO! And on that farm he had {article}
Doc 4: It is believed Thomas d'Urfey wrote a similar version for his opera The Kingdom of the Birds or Wonders of the Sun in 1706, which has evolved
Doc 5: Old Macdonald Had A Farm” is a very fun animal song for toddlers, preschoolers, and babies! Animals songs and learning songs are wonderful