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 did color tv come out in us?" whose answer is in 1953.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did color tv first become available in the us
Useful Output:

Doc 1: On April 14, 1967, WMT-TV Channel 2 in Iowa aired its first-ever color TV broadcast — transitioning from black-and-white to color as the anchor
Doc 2: Interestingly, color television systems had been demonstrated as early as the 1920s, though the technology was refined in the late 1940s. It
Doc 3: The RCA CT-100 and Admiral C1617A were the first color TVs offer for sale on December 30, 1953. Both had a 15-inch screen.
Doc 4: On June 25, 1951, CBS broadcast the very first commercial color TV program. Unfortunately, it nearly went unwatched since most people had only black-and-white
Doc 5: On December 17, 1953, the Federal Communications Commission (FCC) approved RCA's Dot Sequential Color System, and RCA began the first commercial