I'll give you a question, please answer with step-by-step reasoning process.
Yuri Alekseyevich Gagarin (Russian: Ю́рий Алексе́евич Гага́рин, IPA: ( ˈjʉrjɪj ɐljɪˈksjejɪvjɪtɕ ɡɐˈɡarjɪn); 9 March 1934 -- 27 March 1968 ) was a Soviet pilot and cosmonaut. He was the first human to journey into outer space when his Vostok spacecraft completed an orbit of the Earth on 12 April 1961.\n\nAnswer this question: who was the first person gone to space?

Yuri Alekseyevich Gagarin
To answer the above question, the relevant sentence is: He was the first human to journey into outer space when his Vostok spacecraft completed an orbit of the Earth on 12 April 1961.

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So, the answer is Yuri Alekseyevich Gagarin