Complex sentence: In 1961, when Park Chung-hee staged a military coup to seize power, Kim was accused of being a counterrevolutionary as he did not participate in the coup and was detained temporarily until he was released on Park's order.
Split into simpler sentences: In 1961, when Park Chung-hee staged a military coup to seize power, Kim did not participate in the coup and was suspected of being a counterrevolutionary. He was temporarily until he was released on Park's order.