Complex sentence: He was principal trumpet of the Cairo Symphony Orchestra, Egypt, where he became interested in development problems, and he broke the cultural boycott of South Africa and became a principal trumpet with the PACT Symphony Orchestra, to experience apartheid.
Split into simpler sentences: He was principal trumpet of the Cairo Symphony Orchestra, Egypt, where he became interested in development problems. He broke the cultural boycott of South Africa and became a principal trumpet with the PACT Symphony Orchestra, to experience apartheid.