Complex sentence: He gained the attention of the Nationalist Party and Prime Minister Billy Hughes, who encouraged a political career which saw Bruce elected to parliament in 1918, treasurer in 1921 and then prime minister in 1923.
Split into simpler sentences: He gained the attention of the Nationalist Party and Prime Minister Billy Hughes, who encouraged a political career. Bruce was elected to parliament in 1918, treasurer in 1921 and then prime minister in 1923.