Complex sentence: He participated in a 1982 teachers' strike as a member of the National Trade Union of Research and Higher Education, and at this time he formed what would become the Ivorian Popular Front (FPI).
Split into simpler sentences: He participated in a 1982 teachers' strike as a member of the National Trade Union of Research and Higher Education. During the 1982 strike, Gbagbo formed what would become the Ivorian Popular Front (FPI).