Complex sentence: However, the production was delayed, due to the 1989 riots in Argentina; concerned for the safety of the cast and crew, Stigwood and Weintraub balked at the prospects of shooting there.
Split into simpler sentences: However, the production was halted due to the 1989 riots in Argentina. Concerned for the safety of the cast and crew, Stigwood and Weintraub balked at the prospects of shooting there.