Complex sentence: After 1945 free elections were held, in which many party, among them the Smallholders, the Social Democrats, and the Communists got into the Parliament, to Soviet pressure the government coalition led by the Social Democrats accepted the small Communist Party into the coalition.
Split into simpler sentences: After 1945 free elections were held, in which many parties (among them the Smallholders, the Social Democrats, and the Communists) were voted into Parliament. Due to Soviet pressure the government coalition, led by the Social Democrats, accepted the small Communist Party into the coalition.