Complex sentence: He was one of three elected MUC politicians to serve on the board of Montreal International during this time; in 1999, this organization announced an agreement in principle to assume exclusive responsibility for promoting international investment in the MUC and Laval.
Split into simpler sentences: He was one of three elected MUC politicians to serve on the board of Montreal International in this time. In 1999, this organization announced an agreement in principle to assume exclusive responsibility for promoting international investment in the MUC and Laval.