Complex sentence: Matters came to a head in April and June 1954 with a highly publicized Senate Subcommittee on Juvenile Delinquency that targeted violent comic books--which fared poorly.
Split into simpler sentences: Matters came to a head in April and June 1954 with a highly publicized Senate Subcommittee on Juvenile Delinquency. Hearings targeted violent comic books--which fared poorly.