Complex sentence: Over the first eleven recording sessions, Frost is shown struggling to ask planned questions of Nixon, with Nixon able to take up much of the time during the sessions by making long speeches without enabling Frost to challenge him.
Split into simpler sentences: Over the first eleven recording sessions, Frost is shown struggling to ask planned questions of Nixon. Nixon is able to take up much of the time during the sessions by giving lengthy monologues, disabling Frost to challenge him.