Complex sentence: This dispute can be seen as management at Ontario Hydro using one union against another, however, after the strike any worker who left the CUOE to work at other Ontario Hydro plant lost his seniority.
Split into simpler sentences: This dispute can be seen as management at Ontario Hydro using one union against another. After the strike any worker who left the CUOE to work at other Ontario Hydro plant lost his seniority.