Complex sentence: The party was active in 1960s demonstrations, and al-Rafi was detained by Lebanese authorities for his political activities; however, he was a candidate from Tripoli in the 1968 general election.
Split into simpler sentences: The party was active in the 1960s in demonstrations and such, for instance, al-Rafi was detained by the Lebanese authorities because of his political activities. Al-Rafi was a candidate from Tripoli in the 1968 general election.