Complex sentence: Relations between the Soviet Union and the People's Republic of China were very tense at the time, and the Supreme Soviet decided on April 16th to place Vasily under house arrest in Kazan and to deprive him of all privileges.
Split into simpler sentences: Relations between the Soviet Union and the People's Republic of China were very tense at the time. The Supreme Soviet decided on April 16th to place Vasily under house arrest in Kazan and to deprive him of all privileges.