Simplify the following text for a Grade 9 native English-speaking person.
Original: On November 24 , Eisenstein signed a contract with the Trust `` upon the basis of Eisenstein 's desire to be free to direct the making of a picture according to his own ideas of what a Mexican picture should be , and in full faith in Eisenstein 's artistic integrity . ''
Simplified: On November 24 , Eisenstein signed a contract with the Trust . The deal was `` upon the basis of Eisenstein 's desire to be free to direct the making of a picture according to his own ideas of what a Mexican picture should be , and in full faith in Eisenstein 's artistic integrity . ''