Complex sentence: McCarthy hearings were a series of hearings held by the United States Senate's Subcommittee on Investigations (April-June 1954) to investigate conflicting accusations between the United States Army and U.S. Senator Joseph McCarthy.
Split into simpler sentences: McCarthy hearings were a series of hearings held by the United States Senate's Subcommittee on Investigations between April 1954 and June 1954. The hearings were held for the purpose of investigating conflicting accusations between the United States Army and Senator Joseph McCarthy.