Complex sentence: He later participated at the first three sessions of the Second Vatican Council, from 1962 to 1964, and sat on its Board of Presidency; during the Council, Meyer showed himself to be of liberal tendencies TIME Magazine.
Split into simpler sentences: He later participated at the first three sessions of the Second Vatican Council, from 1962 to 1964, and sat on its Board of Presidency. During the Council, Meyer showed himself to be of liberal tendencies TIME Magazine.