Simplify the following text for a Grade 9 native English-speaking person.
Original: It was chosen by the state 's first governor , Henry Hastings Sibley , and was adopted in 1861 , three years after admission of Minnesota to the union .
Simplified: It was chosen by the state 's first governor , Henry Hastings Sibley , and was adopted in 1861 , three years after Minnesota became a state .