Complex sentence: The Security Council hurriedly searched for a new Secretary-General, but over the next few weeks it was in a deadlock, with the United States and the Soviet Union unable to agree on any candidate proposed by other members.
Split into simpler sentences: The Security Council hurriedly searched for a new Secretary-General. But over the next few weeks, it was in a deadlock with the United States and the Soviet Union unable to agree on any candidate proposed by other members.