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 Russian dramatist who wrote The libretto born?" whose answer is 13 May [O.S. 1 May].
Each document should contain about 30 words, and these documents should contain useful information.

Query: Russian dramatist who wrote the libretto
Useful Output:

Doc 1: Here's one reading of the structure of Pushkin's story, and of Tchaikovsky's opera, a rough sketch of the interrelationships between characters
Doc 2: However, Averkiyev seems not to have fulfilled his promise to write the libretto, and Tchaikovsky quickly turned instead to his opera Mazepa.
Doc 3: However, although Shpazhinsky set about writing this libretto in the spring of 1888, Tchaikovsky very soon decided to abandon the idea.
Doc 4: His best-known, very distinctive operas are Eugene Onegin (Moscow, 1879; libretto by the composer and Konstantin S. Shilovsky, after Pushkin)
Doc 5: There the young composer met dramatist Alexander Nikolayevich Ostrovsky, who wrote the libretto for Chaikovsky's first opera, The Voyevoda (1868). From this