Complex sentence: On the 150th anniversary of the abolition of slavery in the British Empire, Knibb was posthumously awarded the Jamaican Order of Merit; the first white male to receive the country's highest civil honour.
Split into simpler sentences: On the 150th anniversary of the abolition of slavery in the British Empire, Knibb was posthumously awarded the Jamaican Order of Merit. He was the first white male to receive the country's highest civil honour.