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: "who pioneered animated movies with his short feature steamboat willie in 1928?" whose answer is Walt Disney.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who pioneered animated movies with Steamboat Willie in 1928
Useful Output:

Doc 1: Steamboat Willie is a 1928 American animated short film directed by Walt Disney and Ub Iwerks. It was produced in black-and-white by Walt Disney Studios.
Doc 2: Walt Disney Animation Studios' Steamboat Willie · Try YouTube Kids.
Doc 3:  pioneered animated cartoon  Steamboat Willie, 1928The animated Steamboat Willie (1928) was the first Mickey Mouse film to include sound.
Doc 4: Steamboat Willie, the first fully synchronized animated film that also introduced Mickey  1928, at Universal's Colony Theater in New York City.
Doc 5: In animation: Walt Disney. Steamboat Willie (1928), Mickey's third film, took the country by storm. A missing element—sound—had been added