Complex sentence: A brilliant organiser and an electrifying speaker, Beetham succeeded in rebuilding the party, and by the late 1970s it was challenging the stranglehold on the two-party system of the long-dominant National and Labour parties.
Split into simpler sentences: A brilliant organiser and an electrifying speaker, Beetham succeeded in rebuilding the part. By the late 1970s, it was challenging the stranglehold on the two-party system of the long-dominant National and Labour parties.