Complex sentence: An interim government was imposed, and elections were held on July 1,1966 that saw Bosch defeated by Joaquín Balaguer of the Reformist Party (now PRSC), who garnered 57% of the vote.
Split into simpler sentences: An interim government was imposed, and elections were fixed for July 1,1966. Bosch was defeated by Joaquín Balaguer of the Reformist Party (now PRSC), who garnered 57% of the vote.