Simplify the following text for a Grade 10 native English-speaking person.
Original: The two had mutual admiration and between the end of October 1930 , and Thanksgiving of that year , Sinclair had secured an extension of Eisenstein 's absences from the USSR , and permission for him to travel to Mexico .
Simplified: Between the end of October 1930 , and Thanksgiving of that year , Sinclair had gotten an extension of Eisenstein 's leave from the Soviet Union .