The Democratic Party was elected in 1950, and remained in control until 1960, when, faced with increasing social and economic difficulties, it was overthrown by a military coup.
Social and economic difficulties were the cause of the Democratic Party's downfall.
mnli hypothesis: Social and economic difficulties were the cause of the Democratic Party's downfall. premise: The Democratic Party was elected in 1950, and remained in control until 1960, when, faced with increasing social and economic difficulties, it was overthrown by a military coup.